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Mathematics
8th
grade
Open Up Resources Math 8 Unit 5 Mid-unit assessment
6 questions
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- 1. Multiple Choice
Select all functions that have (3, 12) s a solution.
y=x2+4
y=4x
y=2x+6
y=x2+3
y=x3
- 2. Multiple Choice
Temperature is a function of time. What is the independent variable?
Time
Variable
y
Temperature
- 3. Multiple Choice
Water in a tank is increasing at a rate of 3 gallons per minute. What is the dependent variable?
Tank
Gallons
Minutes
Variable
- 4. Multiple Choice
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
- 5. Multiple Choice
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.
- 6. Multiple Choice
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.
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