4. if y varies directly with x and y = 72 when x = 6, find y when x is = 2.

a. y = 24
b. y = 21
c. y = 20
d. y = 23


5. if y varies inversely with x, and the constant of variation is 36, find y when x = 3.

a. y = 11
b. y = 15
c. y = 9
d. y = 12

6. if y varies inversely with x and the constant of variation is 80, find y when x = 4.

a. y = 25
b. y = 20
c. y = 30
d. y = 35​