Question

Which of the following equations shows a directly proportionate relationship?

y = -4x
y = 3x - 1
y = 2.75x - 3
y = 7x

Answer 1

first and third

Explanation:

the equation representing direct proportion is

y = kx ← k is the constant of proportion

y = - 4x is in this form with k = - 4

y = 7x is in this form with k = 7