$\"\"$

The average rate change of f from $\"\"$ is $\"\"$ .

The function is $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Simplify) $\"\"$

The average rate change of f from $\"\"$ is

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify) $\"\"$

The average rate change of f from $\"\"$ is 8.