Question

Which graph or equation represents a nonproportional relationship?

A
On coordinate plane A, a line goes through points (negative 2, 0) and (0, 1).
B
On coordinate plane B, a line goes through points (0, 0) and (2, negative 2).

C
y mc019-3.jpg 0.375x

D
y = StartFraction 5 Over 9 EndFraction x

A
B
C
D

Answer 1

A

A proportional linear relationship must be of the form y = kx and pass through (0,0). Options B, C (y = 0.375x), and D (y = 5/9 x) all pass through the origin. A has y-intercept 1 (point (0,1)), so it's nonproportional.