$\"\"$ $\"\"$

\

The slope formula is $\"\"$ .

\

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

\

$\"\"$ (Product of two sames signs is positive)

\

$\"\"$ (Add: $\"\"$ )

\

$\"\"$ (Apply Additive inverse property: $\"\"$ )

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

The slope of $\"\"$ .