Which of the following is not an example of a parent function

Y = x

Y = 2x^3

Y = 1/x

Y = 2^x

A parent function is normally not streched or anything or shhifted

y=kx or

y=x^a or

y=a^x are exapmles

y=x is y=1x

y=2x^3 is not it because the parent would be y=x^3

y=1/x is y=x^-1

y=2^x is y=2^x

answer is 2x^3 is not a parent function