QUIZ 4 REVIEW 24-25

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8.5.I

Graph the function. y = -2x + 1

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8.5.I

Pauline’s Dance Studio charges an initial sign-up fee for dance lessons. The graph shows the total cost for dance lessons after a given number of classes. What is the initial sign-up fee? Assume that the relationship between the two quantities is linear.

• $60

• $0

• $15

• $100

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8.5.I

The bait and tackle shop rents fishing equipment. There is an inital fee for hooks and bait plus an hourly cost to rent fishing rods. The table shows the cost of renting a fishing rod. Determine and interpret the rate of change and initial value. Assume that the relationship between the two quantities is linear.

• 4, 35; The rate of change is $4 per hour. The initial value is $25.

• 7.5, 20; The rate of change is $7.50 per hour. The initial value is $20.

• 10, 26; The rate of change is $10 per hour. The initial value is $26.

• 12.5, 80; The rate of change is $12.50 per hour. The initial value is $80.

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8.5.I

Pete’s Boat Rental charges an initial fee to rent a boat, plus an hourly fee. The table shows the cost to rent a canoe. Determine the initial fee that Pete’s charges to rent a canoe. Assume that the relationship between the two quantities is linear.

(a)  

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8.5.I

The cost to rent a skateboard is $15 per hour. Is the rental a function of the number of hours rented? Justify your response by creating a set of ordered pairs.

• no;

  {(0,15), (1, 30),

  (2, 45), (3,60)}

• yes;

  {(0,0), (1, 15),

  (2, 30), (3,45)}

• no;

  {(1,1), (1, 2),

  (2, 3), (3,4)}

• yes;

  {(0,0), (15, 1),

  (30, 2), (45,3)}

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8.5.G

Martin’s commissions are shown in the table. Determine whether the function is proportional or non-proportional. Explain.

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8.5.H

Determine whether the relation is a function. Explain.

• No; each member of the domain is mapped to exactly one member of the range.

• No; there are members of the domain mapped to more than one member of the range.

• Yes; each member of the domain is mapped to exactly one member of the range.

• Yes; there are members of the domain mapped to more than one member of the range.

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8.5.G

Which x-value will make these ordered pairs a non-function?

{(__, -7), (7, -9), (8, -8), (9, 8)

• -8

• 5

• 7

• -7

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8.5.G

The graph shows my vacation driving this summer. Determine whether the function is proportional or non proportional. Justify your answer.

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8.5.A

8.5.F