The parabola equation $\"\"$ defines a family of parabolas.

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

$\"\"$

$\"\"$ .

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

$\"\"$ .

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

$\"\"$ .

Graph the equations $\"\"$ , $\"\"$ , and $\"\"$ on same window.

$\"\"$

Graph:

$\"\"$ .