What is the average rate of change for this quadratic function for the interval from x=1 to x=3?

The average rate of change is

Step-by-step explanation:

we know that

the average rate of change using the graph is equal to

In this problem we have

Substitute

The average rate of change of function is -4 in [1,3]

Step-by-step explanation:

The average rate of change for graphic quadratic function for the interval from x=1 to x=3

The average rate of change of a function is change y over change in x.

where,

a=1 and b=3

Using graph we will find f(1) and f(3)

f(3)=-8

f(1)=0

Hence, The average rate of change of function is -4 in [1,3]