Proportions: Is It Proportional or Not Proportional?

Determine if the relationship between the time spent studying and the grade received on a test is proportional if studying for 2 hours results in a grade of 80%, and studying for 5 hours results in a grade of 100%.

• Yes, because as the study time increases, the grade increases.

• No, because the rate of increase in grades is not constant.

• Yes, but only if the grades are curved.

• No, because the maximum grade is 100%.

Solve the proportion.

• 5

• 10

• 15

• 6

Solve the proportion. 

• a = 54.84

• a = 55.84

• a = 56.84

• a = 53.84

Solve the proportion. 

• b = 509.53

• b = 508.56

• b = 508.55

• b = 509.12

Is the graph proportional or not proportional?

• proportional

• not proportional

Why does this graph show a non-proportional relationship?

• Because it is proportional

• It goes through the origin

• It does not go through the origin

• It is a straight line

Solve the proportion.

• p=31.3

• p=308

• p=924

• p=532

Solve the proportion:

• 15

• 5

• 10

• 12

Solve the proportion. 

• x = 248.77

• x = 247.88

• x = 256.84

• x = 247.55