Constant Rate of Proportionality

My aunt paid $124 for 4 concert tickets.  What is the rate for 7 concert tickets?

• $210

• $264

• $217

• $224

Which of the following is the correct formula for finding the constant of proportionality?

• k = x/y

• k = y/x

• y = k/x

• x = k/y

The constant of proportionality is also the unit rate.

• True

• False

Write an equation for the proportional relationship in the table.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

Janet used 155 beads to create 5 necklaces.  What is the constant of proportionality?  (How many beads did she use to make each necklace?)

• 31

• 51

• 33

Does this graph show a proportional relationship?

• yes

• no

• you cannot tell

A box of cereal cost $3.59 for 30 oz. How much is the unit rate per ounce? Round to the nearest cent.

• 11 cents

• 12 cents

• 13 cents

• 10 cents

Hadley is driving to Colorado. She has been traveling for 4 hours, and she has driven 260 miles. Find her speed in miles per hour.

• 85

• 65

• 60

• 70

Write and equation in the form of y=kx for a line that passes through the ordered pair (3,9).

• y=1/3X

• y=6x

• y=3x

• y=9x

You spend $40 on 5 pounds of concrete. What is the unit rate in dollars per pound?

• $8 per pound

• $5 per pound

• $35 per pound

• 0.125 pounds per dollar