Question

HELP***
What is the biggest difference between exponential functions and other functions?

Answer 1

In an exponential function, the base is fixed, and the independent variable is in the exponent. This is different from previous functions we have studied, where the exponent was a fixed number and the base varied.

Explanation:

Answer 2

I assume by 'other' functions you mean 'linear' functions.
The biggest difference between exponential and linear functions is that linear functions change at a constant rate, while exponential functions change at a rate proportional to it's value, or exponent.

Basically, that's also what separates exponential functions from all others. It's the only function that changes at a rate proportional to its exponent.