Solve for the unknown value if y varies directly as x. Write your answer on the space before the number.
_____ 1. If y = 5 when x = 2, find y when x = 20.

_____ 2. If y = 8 when x = 2, find y when x = 5.

_____ 3. If x = 6 and y = 72, find y when x = 2.​