https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions/8th-linear-functions-modeling/v/fitting-a-line-to-data 2021-06-30T18:10:16Z Fitting a line to data Sal creates a scatter plot and then fits a line to data on the median California family income. Sal Khan video https://cdn.kastatic.org/googleusercontent/umfhrVAa5_2sNFz-spX-mvqiT_ydf6-8lye5ZyaEx4tkKfdT2mqBdvrZcdcBYy5mNjo_aq5LgnT0k87oYEOR5P-RBA Fitting a line to data Sal creates a scatter plot and then fits a line to data on the median California family income. https://cdn.kastatic.org/ka-youtube-converted/OhUkMQtBGmE.mp4/OhUkMQtBGmE.mp4 468 Introduction to trend lines https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/estimating-the-line-of-best-fit-exercise 2023-05-12T21:01:01.897246564Z Estimating the line of best fit exercise The "line of best fit" is a line that shows the pattern of data points. If we can find a good line, it means there is a linear trend. If not, it means there is no linear trend. We can't ignore points that don't fit the trend. Sal Khan video https://cdn.kastatic.org/googleusercontent/yMNzEamJCQT7A1xvGsloyZpWmvtEQ2nBGFUkm3ccmtXOwVO0Q6DuShSdnqkmswqKPzYy2i8z1R8VYXresfBm2SU Estimating the line of best fit exercise The "line of best fit" is a line that shows the pattern of data points. If we can find a good line, it means there is a linear trend. If not, it means there is no linear trend. We can't ignore points that don't fit the trend. https://cdn.kastatic.org/ka-youtube-converted/ioieTr41L24.mp4/ioieTr41L24.mp4 77 Introduction to trend lines https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/e/plotting_the_line_of_best_fit 2026-03-31T14:59:02.026924717Z Eyeballing the line of best fit Given a random assortment of points, draw a line of best fit through them. Sid Patel exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/example-estimating-from-regression-line 2023-05-12T21:01:01.897246564Z Estimating with linear regression (linear models) A line of best fit is a straight line that shows the relationship between two sets of data. We can use the line to make predictions. To find the best equation for the line, we look at the slope and the y-intercept. Remember, this is just a model, so it's not always perfect! video https://cdn.kastatic.org/ka_thumbnails_cache/050b721e-e79a-4473-8d03-3e6836a1eb9b_1280_720_base.png Estimating with linear regression (linear models) A line of best fit is a straight line that shows the relationship between two sets of data. We can use the line to make predictions. To find the best equation for the line, we look at the slope and the y-intercept. Remember, this is just a model, so it's not always perfect! https://cdn.kastatic.org/ka-youtube-converted/TWkYalFn8lo.mp4/TWkYalFn8lo.mp4 203 Introduction to trend lines https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/e/equations-of-lines-of-best-fit-to-make-predictions 2023-12-11T22:13:00.981327266Z Estimating equations of lines of best fit, and using them to make predictions Practice estimating the equation of a line of best fit through data points in a scatter plot. Then, use the equation to make a prediction. Jeff exercise https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/v/smoking-1945-extrapolation 2023-05-12T21:01:01.897246564Z Line of best fit: smoking in 1945 The scatter plot shows how many adults in America smoked from year to year. We can guess how many smoked in 1945 by drawing a line that slopes down through the points. Then we see how high the line would be 20 years earlier. Sal Khan video https://cdn.kastatic.org/googleusercontent/yZKpVENPaJ0cbI753S0lV0n5d0Bn6Hvs8N4MtCyo9VXE_X59LGtcs5xHl0jUv294K8q-S8pg6YeAVll59ZXn9-6d Line of best fit: smoking in 1945 The scatter plot shows how many adults in America smoked from year to year. We can guess how many smoked in 1945 by drawing a line that slopes down through the points. Then we see how high the line would be 20 years earlier. https://cdn.kastatic.org/ka-youtube-converted/d4WE4SnhBDU.mp4/d4WE4SnhBDU.mp4 287 Introduction to trend lines https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-data/cc-8th-line-of-best-fit/e/linear-models-of-bivariate-data 2026-04-01T14:42:24.233450099Z Estimating slope of line of best fit Given a scatter plot, can you estimate the slope of the line of best fit that goes through the data points? pstinchcombe exercise https://www.khanacademy.org/math/probability/xa88397b6:scatterplots/estimating-trend-lines/a/equations-of-trend-lines-phone-data 2023-02-22T02:28:53.374012061Z Equations of trend lines: Phone data article https://www.khanacademy.org/math/statistics-probability/describing-relationships-quantitative-data/introduction-to-trend-lines/a/linear-regression-review 2024-11-11T02:56:25.272408758Z Linear regression review Linear regression is a process of drawing a line through data in a scatter plot. The line summarizes the data, which is useful when making predictions. article