An exponential function with a base greater than 1 looks as follows:
And an exponential funcion with a base of 1 looks as follows:
So now we can answer the question:
how would the function change if the base of the exponent were 1?
When the base of the exponent is 1, the function has a fixed value of 1, and do not behave the same as when the base is greater than 1.
To answer the next question we need to know how a function with a base between 0 and 1 would look like. Let's take the following example:
And we can now answer:
how would the function change if the base were between 0 and 1?
The function looks like it is inverted (in comparison with the function with a base greater than 1). Meaning that as x increases, the values of the function decrease.