Rate of Change

Water flows from a faucet at a rate of 5 gallons every 25 seconds. At this rate, how many gallons will flow from the faucet in 45 seconds?

• 9 gallons

• 5 gallons

• 11 gallons

• 40 gallons

A machine can pack 70 boxes of spaghetti in 5 minutes. At this rate, how many boxes can they pack in 8 minutes.

• 35 boxes

• 14 boxes

• 112 boxes

• 560 boxes

One snowy day, the snow was falling at a rate of 3 inches per hour.  If it kept snowing at the same rate, now many inches would accumulate in 2½ hours

• 7 ½  inches

• 6 ½ inches

• 5 ½ inches

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

Find the rate of change.

• -2 minutes per gallon

• -20 minutes per gallon

• -2 gallons per minute

• -20 gallons per minute

From the table, what is the rate of change we see happening? (Select all that apply)

• Increase of $75 per adult

• Increase of $375 per 5 adults

• Increase of $150 per 3 adults

• Increase of $2 per 150 adults

What is the rate of change?

What is the rate of change for Function C?

• 2/3

• 3/2

• 3

• 2

What is the rate of change for the following function?

• 1 gallon of blue per gallon of yellow

• 5 gallons of blue per gallons of yellow

Tags

TEKS.MATH.8.4A

TEKS.MATH.8.4B

What is the rate of change for Function A?

• 6

• 2

• 1/3

• 3