The function c(x) = 25.50x + 50 models the total cost for a cleaning company to clean a house, where x is the number of hours it takes to clean the house. what is the average rate of change of the function between 3 hours and 9 hours? a. $17.00 per hour b. $25.50 per hour c. $31.05 per hour d. $42.15 per hour

The average rate of change is $25.5 per hour, option B.

Step-by-step explanation:

Average Rate of Change

When we are explicitly given some function C(x), we sometimes need to know the rate of change of C when x goes from to . It can be computed as the slope of a line .

The provided function is

We are required to compute the average rate of change between the points

Let's compute

The average rate of change is $25.5 per hour, option B.

1.8 or

the answer is d

step-by-step explanation:

y+3=-4(x-2)

y+3=-4x+8

  -3         -3  

y=-4x+5