Question

Which equation represents a proportional relationship between the x and y values? A) y = 2

B) y = 1/4x + 1
C) y = x − 4
D) y = −2x

Answer 1

D

Explanation:

Given x and y are in proportion then the equation relating them is

y = kx ← k is the constant of proportion

The only one fitting this description is

y = - 2x → D

Answer 2

Answer:D) y = −2x

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