Direct Variation

Suppose y varies directly as x. If x = 27 when y = 6, find x when y = 2.

• 0.44

• 81

• 23

• 9

Suppose y varies directly as x. If x = 24 when y = 8, find y when x = 33.

• -1

• 5.8

• 11

• 99

The number of apples sold varies directly as the cost. If 4 apples cost $0.45, find the cost of 12 apples.

• $1.35

• $106.67

• $0.45

• $0.15

Suppose y varies directly as x. If y = 30 when x = 8, find y when x = 4.

• 1.07

• 15

• 26

• 60

Suppose y varies directly as x. If y = -4 when x = 32, find x when y = -0.375.

• 0.05

• 3

• 27.6

• 341.3

The number of books sold varies directly as the cost of the books. If 8 books cost $10.40, how many books can be bought for $32.50?

• 25 books

• 30 books

• 32 books

• 42 books

Suppose y varies directly as x. If x = 15 when y = 12, find x when y = 21.

• 8.57

• 16.8

• 24

• 26.25

The number of days worked varies directly as the amount earned. If a woman earns $805 for 7 days, how many days does she have to work to earn $1840?

• 16 days

• 1042 days

• 20171 days

• 211600 days

Suppose y varies directly as x. If y = 3 when x = 15, find x when y = 5.

• 25

• 17

• 9

• 1

The amount a store earns varies directly as the number of hours. A local store takes in $11,500 in a 4 hour period. Estimate how many hours it would take the store to earn $23,000

• 2 hours

• 8 hours

• 11,504 hours

• 66,125,000 hours