$\"\"$

\

Observe the graph:

\

The parabola is horizontal and vertex is $\"\"$ .

\

Standard form of horizontal parabola is $\"\"$ .

\

Where $\"\"$ is vertex.

\

If $\"\"$ then the parabola opens to the left and $\"\"$ parabola opens to the right.

\

The parabola passes through the point $\"\"$ .

\

$\"\"$

\

Find the value of $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in standard form.

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

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

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

The equation of the parabola is $\"\"$ .