$\"\"$

The points are $\"\"$ and $\"\"$ .

The parameteric equations are $\"\"$ and $\"\"$ .

$\"\"$ .

Rewrite the equation

$\"\"$

Substitute $\"\"$ in $\"\"$ .

$\"\"$

This is the two-point form for the equation of a line.

Its orientation is from $\"\"$ to $\"\"$ .

$\"\"$

Its orientation is from $\"\"$ to $\"\"$ .