Vertical Line Test :

A collection of points is the graph of a function provided that every vertical line

intersects the graph in at most one point.

Consider the vertical line at $\"\"$ , it touches the graph at once.

The graph satisfies the vertical line test.

Thus, the graph is a function.

$\"\"$

Observe the graph of the function :

The domain is $\"\"$ .

The range is $\"\"$ .

$\"\"$

Observe the graph of the function :

The $\"\"$ -intercepts are $\"\"$ and $\"\"$ .

The $\"\"$ -intercept is $\"\"$ .

$\"\"$

Observe the graph of the function :

The graph is symmetric with respect to the $\"\"$ -axis.

$\"\"$

The domain is $\"\"$ .

The range is $\"\"$ .

$\"\"$ Intercepts are $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$ Symmetric with respect to the $\"\"$ -axis.