Constant of Proportionality and Unit Rate

What is the constant of proportionality?

• $3

• $4

• $2

• $9

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

Nick walks 8 miles in 3 hours, and Braylon walks 16 miles in 6 hours. What is the unit rate per hour?

• 2.6

• 2

• 3

• 4.6

Write the equation for this table.
K=9

• y=9

• y=9x

• y=1/9

How many pieces are there per ounce?

• 5 pieces

• 0.2 pieces

• 50 pieces

• 60 pieces

It took Julius 1/3 of an hour to ride his bike 2 & 3/4 of a mile. How many miles per hour can he ride his bike?

• 3 & 1/2

• 6 & 3/4

• 8 & 1/4

• 16 & 1/2

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?

• $1.25 per pound

• $1 per pound

• $2 per pound

• $1.50 per pound

How do you know if a graph is proportional?

• The line will pass through the origin and be curved.

• The line must be straight and pass through the origin.

• The line must pass through any point on the "y- line"

• The line will be positive.

Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change, and if so what is it?

• Yes, 10 calls per minute

• Yes, $.10 per minute

• Yes, $.40 per minute

• Not a constant rate