$\"\"$

Observe the graph :

Select the points from the graph and place them in a table.

Table :

\ \

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

Find the difference between the $\"\"$ -values and diffrence between $\"\"$ -values.

$\"\"$ and $\"\"$ .

The difference between the $\"\"$ –values is $\"\"$ , while the difference between the $\"\"$ –values is $\"\"$ .

Hence, the equation is $\"\"$ .

$\"\"$

Check the solution by substituting $\"\"$ -values in the function :

When $\"\"$ , $\"\"$

Therefore, the $\"\"$ -values are satisfied the equation.

So, the function is $\"\"$ .

$\"\"$

The function is $\"\"$ .