Open Up Resources Math 8 Unit 5 Mid-unit assessment

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.1

CCSS.HSF.LE.A.2

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