$\"\"$

The equations are $\"\"$ .

The equation is $\"\"$ .

Divide each side by 2.

$\"\"$

Cancel common terms.

$\"\"$ .

The simplification of equation $\"\"$ is $\"\"$ .

Therefore the two equations $\"\"$ look different but have the same graph. $\"\"$

The equation $\"\"$ can be written as $\"\"$ . Therefore general equation is $\"\"$ , where k is real number except zero.

The equations $\"\"$ is $\"\"$ graph is

$\"graph$

$\"\"$

The equations $\"\"$ is $\"\"$ graph is

$\"graph$