Constant Rate of Change

Cheese costs $4.45 per pound. Which equation best represents y, the total cost of x pounds of cheese?

• x = 4.25 + y

• x = 4.25y

• y = 4.25 + x

• y = 4.25x

A pilot takes a taxi from the airport to a hotel. The taxi driver charges a $2.50 inital charge plus $2.65 per mile. Which equation can be used to find y, the total cost of the trip if x represents the number of miles of the trip?

• y = 2.50x + 2.65

• y = 2.65(x + 2.50)

• y = 2.65x + 2.50

• y = 2.65x - 2.50

Jeremiah sells flowers for $2 each and a vase for $5. Which equation can be used to find y, the total cost of the flowers and vase if x represents the number of flowers?

• y = 5x + 2

• y = 2x + 5

• y = 5x - 2

• y = 2x - 5

Dakota is training for a marathon. The table shows the number of miles she ran over four weeks. What is the constant rate of change between the number of weeks and the the number of miles. (Hint weeks = x and miles = y) Use the formula k = y/x

• 1 mile per week

• 3 miles per week

• 5 miles per week

• 15 miles per week

An airport starts allowing planes to take off at 6:00 a.m. Based on the table below, what is the constant rate of change between the time and the number of flights taking off at the airport? (Hint: time = x and Flights = y) Use k = y/x

• 2 flights per hour

• 9 flights per hour

• 18 flights per hour

• 27 flights per hour

A cheetah can run a constant speedfor up to one minute. A researcher timed a cheetah while it was running. Based on the times and distances below, how fast did the cheetah run? (Hint seconds is = x and feet is = to y) Use k = y/x

• 1.3 feet per second

• 3 feet per second

• 15 feet per second

• 19.5 feet per second

What is the constant rate for the following table

• y = 1/20x

• y = 20x

• y = 40x

• y = 1/40x

Which table matches the graph. Make sure to make an x/y table and list at least 3 points.

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Which table matches the graph. Make sure to make an x/y table and list at least 3 points.

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Which table matches the graph. Make sure to make an x/y table and list at least 3 points.

• y = $3 per box

• y = $0.33 per box

• y = $3.30 per box

• y = $6 per box