Step 1:

\

The function is $\"\"$ .

\

Two points on the function are $\"\"$ and $\"\"$ .

\

The slope of the secant is $\"\"$ .

\

$\"\"$

\

Step 2:

\

The slope of the secant $\"\"$ :

\

Substitute points $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$

\

Solution :

\

The slope of the secant $\"\"$ is $\"\"$ .

\

\

(b)

\

Step 1:

\

The function is $\"\"$ .

\

Two points on the function are $\"\"$ and $\"\"$ .

\

The slope of the secant is $\"\"$ .

\

$\"\"$

\

Step 2:

\

The slope of the secant $\"\"$ :

\

Substitute points $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$

\

Solution :

\

The slope of the secant $\"\"$ is $\"\"$ .

\

\

\

(c)

\

Step 1:

\

Two points on the function are $\"\"$ and $\"\"$ .

\

The slope of the secant is $\"\"$ .

\

Step 2:

\

The slope of the secant $\"\"$ :

\

Substitute points $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$

\

Rationalize the numerator.

\

$\"\"$

\

Solution :

\

The slope of the secant $\"\"$ is $\"\"$ .