Direct Variation Flashcard

Front

The distance an object falls from a given height varies directly as the square of the time the object falls. A ball falls about 312 meters in 8 seconds. How far did it fall during the first 4 seconds?

Back

156 meters

Front

Shawn’s weekly pay is directly proportional to the number of hours worked. His pay is $123.00 for 20 hours. What is the constant of variation?

Back

k = 6.15

Front

A person’s weekly pay is directly proportional to the number of hours worked. Shawn’s pay is $123.00 for 20 hours of work. What is the equation of variation?

Back

y = 6.15x

Front

A person’s weekly pay is directly proportional 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.

Back

$190.65

Front

At top speed, a rabbit can cover 7 miles in 12 minutes. How long would it take the rabbit to cross 220 miles at this rate?

Back

128.3 minutes

Front

In a direct variation, y=20 when x=15. Find the value of y when x=36.

Back

48

Front

The number of kilograms of water in a person’s body varies directly as the person’s mass. A person with a mass of 90 kg contains 60 kg of water. How many kilograms of water are in a person whose mass is 75 kg?

Back

50 kg water

Front

The annual simple interest on a loan varies directly as the amount of the loan. The interest on a $1000.00 loan is $65.00. Find the interest on a $800 loan.

Back

$52

Front

Suppose y varies directly as x, and y= 4 when x = 10. Find x when y = 8.

Back

20

Front

v varies directly as g, and v = 36 when g = 4. Find v when g = 11.

Back

99