If Y Varies Directly as X, Find the Direct Variation

Multiple Choice

If y varies directly as x, find the direct variation equation for the situation.
-The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 15 minutes requires 12 gallons of water. Find the amount of water used in a shower
Lasting 11 minutes.

A) 165 gallons
B) 8.8 gallons
C) 8 gallons
D) 9.6 gallons