Question

Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 8x and y = 2x + 2 intersect are the solutions of the equation 8x = 2x + 2.

Answer 1

In order to find the points where two graphs intersect, you set the two graphs (equations) equal to each other -- then afterwards, you will solve to find x.

Answer 2

because the point of intersection at y=x makes both equations the same answer which is the x coordinate