If y varies directly as x and y is 18 when x is 5 which expression can be used to find the value of y when x is 11?

The value of y is or 39.6.

Step-by-step explanation:

It is given that y varies directly as x and y. It means y is directly proportional to x.

           .... (1)

where, k is constant of proportionality.

It is given that y is 18 when x is 5.

Substitute y=18 and x=5 in equation (1).

Divide both sides by 5.

The value of k is . So, the relation between x and y is

           .... (2)

We need to find the value of y when x=11.

Therefore the value of y is or 39.6.

180

step-by-step explanation: