This table shows values represented by an exponential function.

12 units per second (Answer C)

Step-by-step explanation:

The "average rate of change of a function on an interval" is essentially the following ratio:

change in function over the interval

     time interval

Here, the time interval is [1, 3] and the corresponding change in the function is found by subtracting f(1) from f(3):

                                             27 - 3

average rate of change:   = 24/2 = 12 units per second

                                              3 - 1

7

step-by-step explanation:

no this is a nonlinear negative