Question

Which linear equation shows a proportional relationship?

A. y=2x+5
B. y=1/5x-7
C. y=-1/5x
D. y=-5

Answer 1

C. y = -1/5x

Explanation:

y = -1/5 exhibits direct proportionality. This means that y varies directly as x (for every change in x, y also experiences change), while the "-1/5" represents the constant of proportionality. Because -1/5 is negative, every increase in x will result in a decrease in y.