Directly and Inversely Proportional Relationships

Direct proportion, inverse proportion or neither?

In 5 hours a man earns £28. How much does he earn in 7 hours?

• Direct

• Inverse

• Neither

Direct proportion, inverse proportion or neither?

In two days my watch loses 4 minutes, how much time does it lose in a week?

• Direct

• Inverse

• Neither

Direct proportion, inverse proportion or neither?

I have 3 cats who eat a bag of cat food every 4 days. If I get another cat, how long will each bag last?

• Direct

• Inverse

• Neither

Direct proportion, inverse proportion or neither?

Four people lay a pipeline in 5 days. How long would ten people take?

• Direct

• Inverse

• Neither

Direct proportion, inverse proportion or neither?

It takes 6 minutes to hard boil three eggs in a pan. How long would it take to boil two eggs?

• Direct

• Inverse

• Neither

Which equation exhibits a direct proportion?

• y = 5x - 2

• y = ³/₄ x

• y - x = 4

• x = 6

m is directly proportional to b

m=24 when b=6

Find the equation for m and b

• m = 4b

• m = 0.25b

• b = 4m

• 6m = 24b

g is directly proportional to b

g=20 when b=4

Find g when b=7

• 35

• 5

• 15

• 23

t is directly proportional to n²

t=144 when n=6

Find the equation for t and n

• t = 4n²

• t = 4n

• t = 24n

• t = 6n²

t is directly proportional to n²

t=144 when n=6

Find n when t=36

• 3

• 1.5

• 24

• 6