8 th Grade Unit 2 Assessment

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# 8 th Grade Unit 2 Assessment - PowerPoint PPT Presentation

8 th Grade Unit 2 Assessment. Interpreting Functions. Question 1. Wardy Tee’s prints t-shirts for \$11 each. There is also a startup cost of \$50 for the order. Write an equation that models this situation. Question 2. Sketch a linear graph that is decreasing. Question 3.

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### 8th Grade Unit 2 Assessment

Interpreting Functions

Question 1

WardyTee’s prints t-shirts for \$11 each. There is also a startup cost of \$50 for the order. Write an equation that models this situation.

Question 2

Sketch a linear graph that is decreasing.

Question 3

Rob is throwing a birthday party at All-Play. It will cost him \$100 to reserve the space at All-Play. In addition, he has to pay \$15 for each of his guests to receive tokens. Write an equation that represents the total cost (y) of the party.

Question 4

Sketch a linear graph that has a zero slope.

Question 5

• Harry is moving to a new home and needs to rent a truck. He has to pay \$19.95 for the truck. He then has to pay \$0.70 for every mile that he drives the truck. Write an equation that represents the total cost (y) of renting the truck.

Question 6

• Sketch a graph with a constant rate of change and with an initial value of 3.

Question 7

• Sally is raising money by selling t-shirts for her choir group. She had to pay \$40 for the box of t-shirts. The equation y=8x – 40 represents this situation where x is the number of t-shirts sold and y is the total amount of money raised.
• In at least one sentence, describe what the 8 represents in the context of this problem.

Question 7 cont.

• Sally is raising money by selling t-shirts for her choir group. She had to pay \$40 for the box of t-shirts. The equation y=8x – 40 represents this situation where x is the number of t-shirts sold and y is the total amount of money raised.
• In at least one sentence, explain why the equation is subtracting 40.

Question 8

• The graph to the right shows Mary’s trip to the store.
• Between which interval(s) was her speed increasing?

Question 8 cont.

• The graph to the right shows Mary’s trip to the store.
• Between which interval(s) did her speed stay the same?

Question 9

• George and Tommy are running home. George gives Tommy a head start of 4 minutes. George runs at a pace of 7 minutes per mile and Tommy runs at a pace of 8 minutes per mile. The equations that represent George and Tommy’s runs are below.
• George: y = 7x
• Tommy: y = 8x + 4
• Describe in at least one sentence what the variable x represents in the equations above.

Question 9 cont.

• George and Tommy are running home. George gives Tommy a head start of 4 minutes. George runs at a pace of 7 minutes per mile and Tommy runs at a pace of 8 minutes per mile. The equations that represent George and Tommy’s runs are below.
• George: y = 7x
• Tommy: y = 8x + 4
• Describe in at least one sentence what the variable y represents in the equations above.

Question 10

• Create a story that has a rate of change of 8 and an initial value of 10. Define the variables and write the equation that represents the story.