Which of the following is an exponential function? (y =2x^2) (y = 2^x) (y =x^-2) (y =1/2x)

Answer 1

y=2^2

exponential function means a variable as the exponent

Answer 2

In exponential function, the argument "x" is in the exponent.

There is only one function out of 4 given ones, which satisfies this condition:

y = 2^x