What is the average rate of change for this quadratic function for the interval from x = 0 to x = 3 ?

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 fiction change if the base of the exponent were between 0and 1

True or false look at the picture pls : /

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?