Problems Involving Direct Variation

Suppose y varies directly as x.

If y = 22.5 when x = 15, find y when x = 20.

• 1.5

• 337.5

• 30

• 16.875

If y varies directly with x,

and y = 8 when x = 3,

what is x when y = -56?

• 21

• -21

• -149.33

• 149.33

If y varies directly with x,

and y = 8 when x = -4,

what is x when y = -48?

• -96

• 24

• 96

• -24

The amount of money earned on a job is directly proportional to the number of hours worked. If $240 is earned in 16 hours, how much money is earned in a 40-hour work week?

• $480

• $600

• $15

• $265

If y varies directly with x and y = 4 when x = -4, find y when x =7.

• 4

• 7

• -7

• -4

If y varies directly with x,

and y = 26 when x = -1,

what is x when y = -78?

• 2028

• -2028

• 3

• -3

“A car travels a distance of d kilometers in t hours. What type of variation illustrates this situation?

• Direct Variation

• Inverse Variation

• Joint Variation

• Combined Variation

Suppose "y varies directly as x". If y = 42 when x = 6, find y when x = 8.

• 48

• 56

• 63

• 72

Suppose "y varies directly as x". If y = 42 when x = 6, solve for the constant, k.

• 252

• 42

• 7

• 6

Alexa uses 400 g of flour to make 8 muffins. How much flour would he need to make 30 muffins?

• 50 grams

• 150 grams

• 500 grams

• 1500 grams

Tags

CCSS.6.RP.A.3B