Modeling with Rates and Constants

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

• $.50 per pound

• $1.25 per pound

• $3 per pound

• $2.50 per pound

A cashier at the grocery store rung up 2 customers in 8 minutes. At this rate, how many customers can he ring up in 30 minutes?

• 16 customers

• 10.5 customers

• 7.5 customers

• 14 customers

After 3 hours, Ernie had travelled 195 miles. If he travels at a constant speed, how far will he have travelled after 5 hours?

• 400 miles

• 325 miles

• 575 miles

• 650 miles

It cost me $46.80 to fill my 13-gallon gas tank. What was the price of gas per gallon?

• $3.60

• $3.55

• $3.40

• $3.50

A car is going 50 miles per hour. A rate that describes this would have units of

• Miles and cars

• Miles and hours

• Miles only

• Hours only

unit rate is a rate in which the unit in the denominator is:

• 0

• 3

• 1

• 2

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

Is the graph proportional or non proportional(not proportional)?

• proportional

• non proportional

What does the y-intercept represent?

• It costs $30 for each mile drive.

• There is an initial charge of $30 for the moving van.

• There is an initial charge of $2 for the moving van.

• It costs $1 for every 2 miles driven.

What is the constant of proportionality?

• $3

• $4

• $2

• $9