Question

How do you know a graph represents direct variation?

Answer 1

see explanation

Explanation:

A graph representing direct variation is a straight line graph passing through the origin.

Answer 2

A graph shows direct variation if it goes through the origin, (0,0) . The equation is y=kx , where k is a constant, which is apparent when we write the equation as yx=k . In slope-intercept form, the equation would be y=mx+b , where m=k , and b=0 .