Direct Proportionality

If this table is proportional, what is the equation for the table?

• Table is not proportional

• y=3x

• y=1/3x

y=-2x

Is this equation proportional? If it is, find the constant of proportionality.

• Not proportional

• Proportional, k=2

• Proportional, k=-2

Is this graph proportional? If it is, find the constant of proportionality.

• Not proportional

• Proportional, k=1.5 or 3/2

• Proportional, k=0.67 or 2/3

Adam runs for 30 minutes. His fitbit tells him he ran 3 miles.

Is this situation proportional?

• Proportional

• Not Proportional

Erica runs for 30 minutes. Her fitbit tells her she burned 300 calories.

If this situation is proportional, find the constant of proportionality.

• Not proportional

• Proportional, k=0.1 calories per minute

• Proportional, k=10 calories per minute

In make-Believeland, the Browns scored 28 points in their 4 quarter football game.

What is the constant of proportionality?

• Not proportional, so no k

• k=7 points per quarter

• k=0.14 points per quarter

• k=28 points per quarter

• k=4 points per quarter

In make-Believeland, the Browns scored 28 points in their 4 quarter football game. If this is proportional, what equation describes the browns average points per quarter?

• Not proportional

• y=4x

• y=28x

• y=7x

What is the value of y when x = 3?

• 18

• 20

• 23

• 43

The circumference (C cm) of a circle is directly proportional to its diameter (d cm).

The circumference of a circle of diameter 3.5 cm is 11 cm

What is the circumference of a circle of diameter 4.2 cm?

• 9.17 cm

• 11.7 cm

• 13.2 cm

• 14 cm

John and Karen both insure their properties with the Budget Insurance Company. The cost of house insurance premiums with the Budget Insurance Company is directly proportional to the value of the property being insured. John pays premiums of $76 per month on his property valued at $152,000 How much does Karen pay on her property valued at $259,000?

• $44.60

• $129.50

• $183.00

• $205.50