Math 8 Unit 5 Mid-Unit Review

Select all functions that have (3, 12) s a solution.

• y=x²+4

• y=4x

• y=2x+6

• y=x²+3

• y=x³

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Temperature is a function of time. What is the independent variable?

• Time

• Variable

• y

• Temperature

Tags

CCSS.HSF.IF.A.2

Water in a tank is increasing at a rate of 3 gallons per minute. What is the dependent variable?

• Tank

• Gallons

• Minutes

• Variable

Tags

CCSS.6.EE.C.9

Elena runs at 3 miles per hour. Jada runs at 6.2 miles per 2 hours. Lin runs at 2 miles per half hour. I run at 1.5 miles for 30 minutes. Who runs fastest?

• Elena

• Jada

• Lin

• Me

Tags

CCSS.6.RP.A.3B

Andre counts the number of gnats on some fruit each day. The first day there are 5 gnats. The 3rd day there are 30 gnats. The 5th day there are 107 gnats. Would a linear model be appropriate?

• Yes. I could predict the number of gnats with confidence for days 2 and 4.

• Yes. If I graphed the ordered airs, they would make a line.

• No, there is no pattern with which I could make reasonable prediction.

• No. Gnats are nasty and could all die the next day.

Tags

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.1

My uncle has his own plumbing company. He charges $50 plus $25 for each hour. My cousin has another plumbing business. She charges $60 plus $20 per hour. If cost were your main concern, and you know your job will be 8 hours, who would you choose? My uncle or my cousin?

• Your uncle. After 8 hours his charges would total $250 and your cousin would charge $220.

• Your cousin. After 8 hours her charges would total $250 and your uncle would charge $320.

• Your uncle. After 8 hours his charges would total $425 and your cousin would charge $500.

• Your cousin. After 8 hours her charges would total $200 and your uncle would charge $250.

Tags

CCSS.8.F.A.2

CCSS.HSF.IF.C.9

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Tags

CCSS.8.F.A.1

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Tags

CCSS.8.F.A.1

Which two functions have a graph that is a line?

• y = 3/x + 2

• y = 2x²– 9x

• y = –3^x

• y = 2x – 9

• y = –6x/7

Tags

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.1

CCSS.HSA.REI.D.10