Question

Which equation represents a proportional relationship?

y=x+1
y=3x+3
y=4x
y=8+x

Answer 1

y=4x

Explanation:

All other equations have a y-intercept. When graphed, the y-value will not start at zero; in a proportional relationship, the y-value starts at zero and increases at a rate proportional to the x-value. :)