Question

Which equation represents a proportional relationship?

y = 5x + 1

y=15x

y=−x

y=−5(x+1)

Answer 1

y = 15x

Explanation:

A proportional relationship is of the form

y = kx ← k is the constant of proportionality

The only relationship fitting this relationship is

y = 15x with k = 15

Answer 2

y=15x

hope this helped :)