Question

Which of the following functions has an inverse that is not a function?
A. y = x
B. y = 2x + 1
C. y = x²

Answer 1

c

Answer 2

because the square root of 100 (for example) can be 10 or negative ten and a function cant have two values for a given imput

Answer 3

* input

Answer 4

C because the square root of X=y is not a function