$\"\"$

Observe the given table :

When the value of $\"\"$ increases, the value of $\"\"$ also increases.

So, $\"\"$ is directly proportional to $\"\"$ .

$\"\"$

Thus, the variation model is in the form of $\"\"$ .

Now find the value of $\"\"$ .

Consider $\"\"$ .

Substitute the values of $\"\"$ and $\"\"$ in above equation.

$\"\"$

Divide each side by 5.

$\"\"$ .

Thus, the variation model is $\"\"$ . $\"\"$

The variation model is $\"\"$ .