Question

How do you write the direct variation equation of the graph through the points (0, 0) and (2, -2)?

Answer 1

It would be y= -x

First thing slope of the line through (0,0) and (2, -2). It would be `(-2-0)/(2-0)` = `-2/2` = -1. Since the line passes through (0,0), y intercept would be 0 and its equation would be y = -x