$\"\"$

The function is $\"\"$ .

Find the vertex, axis symmetry and direction of opening.

The vertex form of a parabola is $\"\"$ .

Where $\"\"$ is the vertex, $\"\"$ is the axis of symmetry and $\"\"$ determines the shape of the parabola and the direction in which it opens.

Therefore vertex is $\"\"$ .

The equation of axis of symmetry is $\"\"$ .

The value of $\"\"$ is negative,the parabola opens down.

$\"\"$

Graph:

Graph the function $\"\"$ .

$\"\"$

Axis of symmetry is $\"\"$ , the parabola opens down.

Graph the function $\"\"$ .

$\"\"$