Question

Which of the following equations represents a proportional relationship?

a
y = 5x
b
y = x + 1/2
c
y = 1/2 x + 5
d
y = 5/x

Answer 1

(a)

Explanation:

The equation representing a proportional relationship is

y = kx ← k is the constant of proportion

The only equation fitting this description is (a) y = 5x