Amplitude: 4
If midline means center, it is -5
I'm also implying that there is an x in cos(4x)
The equations

and

are really the same, we're just setting
, or
.

So we get

Answer:
24.2
Step-by-step explanation:
divide 60.50 by 30 then multiply that by 12
Option C: -3 is the average rate of change between
and 
Explanation:
The formula to determine the average rate of change is given by
Average rate of change = 
We need to find the average rate of change between
and 
Thus, from the table, we have,
, 
, 
Thus, substituting these values in the formula, we get,
Average rate of change = 


Thus, the average rate of change between
and
is -3.
Hence, Option C is the correct answer.