Video

Number of solutions to a system of equations graphically (Full video)

Khan Academy

Supporting grades: 8

Description: Sal determines how many solutions the following system of equations has by considering its graph: 10x - 2y = 4 and 10x - 2y = 16. Created by Sal Khan. So that we don't get stumped by the Arbeglas in our life and especially when we don't have talking birds to help us, we should be able to identify when things get a little bit weird with our systems of equations. Then you have the other scenario where they're consistent, they intersect,but they're essentially the same line. It's consistent, you do have solutions here, but they're dependent equations.

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