Solving linear systems graphically

7 videos
1 skill
We already know that we can represent the set of all x-y pairs that satisfy a linear equation as a line. If there is a point where two of these lines intersect, then the x-y pair corresponding to that point must satisfy both equations. Common Core Standards: 8.EE.C.8, 8.EE.C.8a

Solving linear systems by graphing

VIDEO 8:30 minutes
Solving Linear Systems by Graphing

How to check a solution to a system of equations (example)

VIDEO 2:38 minutes
Sal checks whether (-1,7) is a solution of the system: x+2y=13 and 3x-y=-11.

Graphing systems of equations

VIDEO 6:35 minutes
Graphing Systems of Equations

Graphical systems application problem

VIDEO 5:19 minutes
Graphical Systems Application Problem

How to determine the number of solutions of a system of equations given its graph (example)

VIDEO 3:26 minutes
Sal is given three lines on the coordinate plane, and identifies one system of two lines that has a single solution, and one system that has no solution.

Example 3: Graphically solving systems

VIDEO 5:08 minutes
Solving systems by graphing 3

How to solve a system of linear equations graphically (example)

VIDEO 2:22 minutes
Sal graphs the following system of equations and solves it by looking for the intersection point: y=7/5x-5 and y=3/5x-1.

Solve systems of equations graphically

Graph a system of equations in slope-intercept or standard form, and find their solution using the graphs.