$\"\"$

The end points of line segments are $\"\"$ and $\"\"$ .

Slope of a line : $\"\"$ .

$\"\"$

Slope of the line segment with the end points $\"\"$ and $\"\"$ is $\"\"$ .

Line equation : $\"\"$ .

Line equation for the point $\"\"$ with the slope $\"\"$ is

$\"\"$

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

$\"\"$

Let $\"\"$ .

Substitute $\"\"$ in above equation.

$\"\"$ .

Thus, the parametric equations are $\"\"$ and $\"\"$ .

$\"\"$

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