Explaining exponential growth in terms of the base of the exponent in exponential growth functions, the base of the exponent must be greater than 1. how would the function change if the base of the exponent were 1? how would the function change if the base of the exponent were between 0 and 1?

Take an example  y = 2^x   The exponent is x.
when x = 1,2 and 3  y will be 2^1 = 2, 2^2 = 4  and 2^3 = 8
So the values of y grow very rapidly  with base 2.  
They would grow even more rapidly with  higher bases.

if the base = 1 there would be no growth because 1 to any exponent still = 1.
1^2 = 1 , 1^1000 = 1  and so on.

Don’t worry about it

Ibelieve it is