Question

Which equation is not a linear function?
y = 3x
y = x + 3
y = x3
y = x - 3

Answer 1

y = x^(3) (you have it written as y = x3)

Explanation:

When x is cubed, squared, or to the power of anything, the function is not linear. You'll find that if you plug in values for x, the line will not be straight. However, all other examples are a straight line.

Answer 2

i think that it is y = x3

Explanation:

the rest are clearly linear functions

hope it helped you