Question

Which linear equation shows a proportional relationship?

y = −2
y = 3x + 1
y equals three halves times x
y equals one half times x minus 3

Answer 1

y equals three halves times x

Explanation:

A proportional relationship needs to be the form

y = mx

All the choices are the form

y = mx + b except for the third choice

y equals three halves times x

y = 3/2x

There is not b stated. That means that the b is zero and the line goes through the origin (0,0) which a proportional relations does.

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