$\"\"$

\

The function is $\"\"$

\

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

\

$\"\"$

\

$\"\"$ (Substitute x and y)

\

$\"\"$

\

The slope is $\"\"$

\

The point-slope form is $\"\"$

\

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

\

$\"\"$

\

$\"\"$ (Subtract 4 from each side)

\

$\"\"$

\

The of the equation are $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Therefore the tangent line equation is $\"\"$ .

\

as $\"\"$ and $\"\"$ .