Functions and Volume: Mid-Unit Assessment (A)

Select all the functions whose graphs include the point (16, 4).

• y = 2x

• y = x + 12

• y = x - 12

• y = (1/4)x

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

This graph shows the temperature in Diego’s house between noon and midnight one day. Select all the true statements.

• A. Time is a function of temperature.

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

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

• D. The temperature was 74 degrees twice during the 12-hour period.

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

Tags

CCSS.8.EE.B.5

This table shows a linear relationship between the amount of water in a tank and time. | time (minutes) | water (gallons) | |---------------|----------------| | 0 | 30 | | 5 | 20 | | 10 | 10 | Which of these statements is true?

• The water in the tank is increasing at a rate of 2 gallons per minute.

• The water in the tank is increasing at a rate of 10 gallons per minute.

• The water in the tank is decreasing at a rate of 2 gallons per minute.

• The water in the tank is decreasing at a rate of 10 gallons per minute.

Tags

CCSS.HSF-LE.A.1B

What was her fastest speed, in miles per hour?

• 50 mph

• 60 mph

• 70 mph

• 80 mph

Tags

CCSS.HSF.IF.B.4

Lin counts 5 bacteria under a microscope. She counts them again each day for 4 days, and finds the number of bacteria doubled each day, from 5 to 10, then from 10 to 20 and so on. Is the population of bacteria a function of the number of days? If so, is it linear?

• Yes, it is a linear function.

• Yes, it is a non-linear function.

• No, it is not a function of the number of days.

• It depends on other factors.

Tags

CCSS.8.F.A.3

Two plumbing companies charge money for each hour of work, plus a one-time fee. A Plus Plumbing charges according to this table: [time (hours), cost (dollars): 1, 140; 4, 320; 6, 440]. How much does A Plus Plumbing cost for each hour of work, and what is the one-time fee?

• $50 per hour, $90 one-time fee

• $60 per hour, $80 one-time fee

• $70 per hour, $70 one-time fee

• $80 per hour, $60 one-time fee

Tags

CCSS.8.EE.C.8C

Two plumbing companies charge money 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 of work, and what is the one-time fee?

• $50 per hour, $30 one-time fee

• $40 per hour, $20 one-time fee

• $60 per hour, $40 one-time fee

• $70 per hour, $50 one-time fee

Tags

CCSS.HSF.LE.B.5

Two plumbing companies charge money for each hour of work, plus a one-time fee. Can A Plus Plumbing and Quality Plumbing ever charge the same total for the same amount of time?

• Yes, if their hourly rates and one-time fees are the same.

• Yes, if the difference in their hourly rates is equal to the difference in their one-time fees.

• No, they can never charge the same total for the same amount of time.

• Yes, if they work for a specific number of hours where the total charges equalize.

An input can have more than one output

• True
• False

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

For a function, each input needs exactly one output

• True
• False

Tags

CCSS.8.F.A.1