Direct Variation

Y varies directly as X; and Y = 21 when X = 3. Then find X when Y = 42.

Y varies directly as X, and Y = 8 when X = 16. Then find X when Y = 16.

Heather’s weekly pay varies directly to the number of hours she works at the record store. Her pay is $174 for 24 hours of work. Find the amount of pay for 40 hours of work.

A person’s weekly pay varies directly to the number of hours worked. Shawn’s pay is $123.00 for 20 hours of work. Find the amount of pay for 31 hours of work. HINT: YOU SHOULD GET A DECIMAL ANSWER.

At top speed, a rabbit can cover 8 miles in 12 minutes. If a rabbit could continue at this rate indefinitely, how long would it take the rabbit to cross the 220-mile expanse of the Mojave Desert?

The gallons of water a dishwasher uses is directly proportional to the loads of dishes. A dishwasher uses 65 gallons of water to wash 5 loads of dishes. How many gallons of water would be used to wash 14 loads?

Two minutes after a skydiver opens his parachute, he has descended 1,900 feet. After 5 minutes, he has descended 4,940 feet. If the distance varies directly as the time, at what rate is the skydiver descending?

8v - 4(v + 8) = 8

Solve: 5x + 15 = 10x - 40