Answer:
Step-by-step explanation:
Constants of proportionality appear in equations where the y intercept = 0
They are of the form y = ax
A: No. The y intercept is -3
C: No. The equation is not linear. It is of the form y = a/x which does not give a straight line. a = 21 and the y intercept is 0. It is just that the x is in the wrong place (in the denominator).
D is the same as A.
The answer is B and the constant is 150
