Question

The graph shows the quadratic function f(x) .


What is the average rate of change for the quadratic function from x = 4 to x = 8?

Answer 1

the average rate of change formula is A(x)= f(x) - f(a)
                                                                           x - a 

Answer 2

Answer:

-2

Step-by-step explanation:

The average rate of change would be change in y divided by change in x

Value of the function at x = 4 is 12

Value of the function at x = 8 is 4

Hence,

• change in y is $4-12=-8$
• change in x is $8-4=4$

Average rate of change from x = 4 to x = 8 is $\frac{-8}{4}=-2$