Unit 8.5, End-Unit Assessment: Form A

This table shows a linear relationship between the amount of water in a container and time.

Which of these statements is true?

The water in the container is:

• Increasing at 2 gallons per minute.

• Increasing at 10 gallons per minute.

• Decreasing at 2 gallons per minute.

• Decreasing at 10 gallons per minute.

Tags

CCSS.HSF-LE.A.1B

A cylinder has a volume of 78 cm³.

What is the volume of a cone with the same radius and height?

• 26 cm³

• 39 cm³

• 156 cm³

• 234 cm³

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

This graph shows the temperature in Mariam’s house between noon and midnight one day.

Select ALL of the true statements.

(There could be more than one)

• Time is a function of temperature.

• The lowest temperature occurred between 4:00 and 5:00.

• The temperature was increasing between 9:00 and 10:00.

• The temperature was 74° twice during this time.

• There was a four-hour period during which the temperature did not change.

Tags

CCSS.HSF-IF.C.7B

A cylinder has a radius of 2.5 meters. Its volume is 37.5π cubic meters.

What is the height of the cylinder?

• 1 meter

• 6 meters

• 3 meters

• 4 meters

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Lucia counts 5 bacteria under a microscope.

She counts them again each day for 4 days and notices that the number of bacteria doubles each day.

Is the population of bacteria a function of the number of days?

Tags

CCSS.HSF.IF.A.2

Lucia counts 5 bacteria under a microscope.

She counts them again each day for 4 days and notices that the number of bacteria doubles each day.

Is there a linear relationship between the number of days and the number of bacteria?

Two plumbing companies charge for each hour of work, plus a one-time fee.

Quality Plumbing charges according to this graph.

How much does Quality Plumbing charge for each hour?

What is the one-time fee? Explain or show your thinking.

• $50 per hour, $150 one-time fee

• $40 per hour, $200 one-time fee

• $60 per hour, $250 one-time fee

• $30 per hour, $300 one-time fee

Tags

CCSS.HSF.LE.B.5

A-Plus Plumbing charges according to this table.

How much does A-Plus Plumbing charge for each hour? What is the one-time fee?

• $50 per hour, $30 one-time fee

• $40 per hour, $20 one-time fee

• $60 per hour, $80 one-time fee

• $55 per hour, $35 one-time fee

Tags

CCSS.8.EE.C.8C

Two plumbing companies charge for each hour of work, plus a one-time fee.

Is the cost of using Quality Plumbing or A-Plus Plumbing ever the same for the same amount of time?

• Yes, A-Plus Plumbing has a lower one-time fee but costs more per hour, so it will eventually catch up to Quality Plumbing

• No, the cost will never be the same for any amount of time.

• No, B-Plus Plumbing has a lower one-time fee but costs more per hour, so it will eventually catch up to Quality Plumbing

• The information provided is insufficient to determine.