https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:linear-equations-graphs/x2f8bb11595b61c86:horizontal-vertical-lines/v/slope-of-a-line-3 2021-06-21T15:29:04Z Slope of a horizontal line When two points have the same y-value, it means they lie on a horizontal line. The slope of such a line is 0, and you will also find this by using the slope formula. Sal Khan video https://cdn.kastatic.org/googleusercontent/cBTmC5MfEidAmKp2M-8G1EExTbKL44_xgFWcpb_jz2rH2b0o6mhDXA5m6pKrsCmANKgyZ4jVYD9ER_m-fyPGyDFg Slope of a horizontal line When two points have the same y-value, it means they lie on a horizontal line. The slope of such a line is 0, and you will also find this by using the slope formula. https://cdn.kastatic.org/ka-youtube-converted/CFSHq099Mx0.mp4/CFSHq099Mx0.mp4 305 Point-slope and two point form of a line https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:linear-equations-graphs/x2f8bb11595b61c86:horizontal-vertical-lines/v/examples-of-slopes-and-equations-of-horizontal-and-vertical-lines 2022-10-06T23:01:00.745424633Z Horizontal & vertical lines Worked examples identifying the equations and slope of horizontal and vertical lines. video https://cdn.kastatic.org/ka_thumbnails_cache/8d7ae83b-942d-4b77-9d6a-7418917f860a_1280_720_base.png Horizontal & vertical lines Worked examples identifying the equations and slope of horizontal and vertical lines. https://cdn.kastatic.org/ka-youtube-converted/J43CIbKpdWc.mp4/J43CIbKpdWc.mp4 315 Point-slope and two point form of a line https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:linear-equations-graphs/x2f8bb11595b61c86:horizontal-vertical-lines/e/horizontal-and-vertical-lines 2026-04-07T22:59:30.107127435Z Horizontal & vertical lines Practice your knowledge of horizontal and vertical lines: their graphical presentation, their slopes, and their equations. Tomer Gal exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:forms-of-linear-equations/x2f8bb11595b61c86:point-slope-form/v/idea-behind-point-slope-form 2021-06-30T17:32:37Z Intro to point-slope form Point-slope is the general form y-y₁=m(x-x₁) for linear equations. It emphasizes the slope of the line and a point on the line (that is not the y-intercept). Watch this video to learn more about it and see some examples. Sal Khan video https://cdn.kastatic.org/googleusercontent/dW_2fPLtjUCrj5X_ewTIbdsFRNUJVXdV8ApEd6lbMGOyKfFYA2676a-wSBF9QlgaaZsv_cMV8KhU0IVLfzI2j3-3 Intro to point-slope form Point-slope is the general form y-y₁=m(x-x₁) for linear equations. It emphasizes the slope of the line and a point on the line (that is not the y-intercept). Watch this video to learn more about it and see some examples. https://cdn.kastatic.org/ka-youtube-converted/K_OI9LA54AA.mp4/K_OI9LA54AA.mp4 367 Point-slope and two point form of a line https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:forms-of-linear-equations/x2f8bb11595b61c86:point-slope-form/v/point-slope-and-slope-intercept-form-from-two-points 2022-11-16T04:22:43.7414897Z Point-slope & slope-intercept equations Point-slope is the general form y-y₁=m(x-x₁) for linear equations. It emphasizes the slope of the line and a point on the line (that is not the y-intercept). We can rewrite an equation in point-slope form to be in slope-intercept form y=mx+b, to highlight the same line's slope and y-intercept. video https://cdn.kastatic.org/googleusercontent/7rFrdHW7AJ9ak3aFW83nepxIU_OyzEN4HrIi6pPz24TmO6vkpBIwAAGji3mMgpppw6HLueeJhjfze398WDMYLqAw Point-slope & slope-intercept equations Point-slope is the general form y-y₁=m(x-x₁) for linear equations. It emphasizes the slope of the line and a point on the line (that is not the y-intercept). We can rewrite an equation in point-slope form to be in slope-intercept form y=mx+b, to highlight the same line's slope and y-intercept. https://cdn.kastatic.org/ka-youtube-converted/LtpXvUCrgrM.mp4/LtpXvUCrgrM.mp4 427 Point-slope and two point form of a line https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:straight-lines-ncert-new/x0419e5b3b578592a:various-forms-of-the-equation-of-a-line/v/equation-of-a-line-in-2-point-form 2025-05-22T11:09:14.016569349Z Equation of a line in 2-point form In this video, we'll learn how to find the equation of a line in 2-point form. We leverage the previously derived form - slope point form for this. If we are given two points, we first find the slope using the coordinates of these points. We then use this slope and one of the points to get the equation in slope point form. If we generalise the result and eliminate the slope from the equation, we get the 2-point form. We also solve a practice problem where we have to find the equation of the median of a triangle. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Equation of a line in 2-point form In this video, we'll learn how to find the equation of a line in 2-point form. We leverage the previously derived form - slope point form for this. If we are given two points, we first find the slope using the coordinates of these points. We then use this slope and one of the points to get the equation in slope point form. If we generalise the result and eliminate the slope from the equation, we get the 2-point form. We also solve a practice problem where we have to find the equation of the median of a triangle. https://cdn.kastatic.org/ka-youtube-converted/UBoy6S-bQCc.mp4/UBoy6S-bQCc.mp4 335 Point-slope and two point form of a line https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:straight-lines-ncert-new/x0419e5b3b578592a:various-forms-of-the-equation-of-a-line/e/equation-of-a-line-in-2-point-form 2025-08-08T02:53:40.009522544Z Equation of a line in 2-point form Equation of a line in 2-point form Ashish Gupta exercise https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:straight-lines-ncert-new/x0419e5b3b578592a:various-forms-of-the-equation-of-a-line/v/equation-of-a-line-applying-trigonometric-identities 2025-05-22T11:09:14.016569349Z Equation of a line (applying Trigonometric Identities) In this video, we learn how to leverage identities learnt in Trigonometry to find slopes of lines having some uncommon angles. We take the example of 75 degrees here which can be broken down intow 45 and 30. Both these angles are easier to work with. Once we have the slope, we use slope point form to generate the equation. We also practice writing the equation in its standard form. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Equation of a line (applying Trigonometric Identities) In this video, we learn how to leverage identities learnt in Trigonometry to find slopes of lines having some uncommon angles. We take the example of 75 degrees here which can be broken down intow 45 and 30. Both these angles are easier to work with. Once we have the slope, we use slope point form to generate the equation. We also practice writing the equation in its standard form. https://cdn.kastatic.org/ka-youtube-converted/VG-isz-mPbw.mp4/VG-isz-mPbw.mp4 214 Point-slope and two point form of a line https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:straight-lines-ncert-new/x0419e5b3b578592a:various-forms-of-the-equation-of-a-line/v/eq-of-a-line-dividing-another-line-in-a-given-ratio 2025-05-22T11:09:14.016569349Z Eq. of a line dividing another line in a given ratio In this video, we learn how to solve problems that involve a line dividing another line in a given ratio. We formulate a strategy to tackle such situations. We first find the point of intersection using the section formula. We then find the slope using the concept of perpendicular lines. Once we have both the slope and a point on the line, we use slope point form to generate its equation. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Eq. of a line dividing another line in a given ratio In this video, we learn how to solve problems that involve a line dividing another line in a given ratio. We formulate a strategy to tackle such situations. We first find the point of intersection using the section formula. We then find the slope using the concept of perpendicular lines. Once we have both the slope and a point on the line, we use slope point form to generate its equation. https://cdn.kastatic.org/ka-youtube-converted/VXFMljz-hSc.mp4/VXFMljz-hSc.mp4 356 Point-slope and two point form of a line https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:straight-lines-ncert-new/x0419e5b3b578592a:various-forms-of-the-equation-of-a-line/e/equation-of-a-line-dividing-another-line-in-a-given-ratio 2025-08-08T02:53:40.009522544Z Equation of a line dividing another line in a given ratio Equation of a line dividing another line in a given ratio Ashish Gupta exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:forms-of-linear-equations/x2f8bb11595b61c86:point-slope-form/e/converting_between_point_slope_and_slope_intercept 2025-03-01T15:52:37.13987578Z Point-slope form Write equations in point-slope form given two pairs of values, and convert the equation into slope-intercept form. Tomer Gal exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:forms-of-linear-equations/x2f8bb11595b61c86:point-slope-form/a/point-slope-form-review 2026-02-13T15:30:39.626178436Z Point-slope form review Review point-slope form and how to use it to solve problems. article