Problems Involving Direct Variation

Suppose y varies directly as x.

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

If y varies directly with x,

and y = 8 when x = 3,

what is x when y = -56?

If y varies directly with x,

and y = 8 when x = -4,

what is x when y = -48?

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?

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

If y varies directly with x,

and y = 26 when x = -1,

what is x when y = -78?

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

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

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

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