Unit 2 Practice

Which representation does NOT show y as a function of x?

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CCSS.8.F.A.1

Jose is selling chocolate as a fundraiser. The chocolate sells for $3 per box. Which table represents this relationship?

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CCSS.5.OA.B.3

Which of the following represents a linear function that is proportional?

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CCSS.8.EE.B.5

Which of the following mappings represents a function?

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CCSS.8.F.A.1

If y varies directly with x and x = 3 when y = 21, what is y when x = 2?

• y = 3.5

• y = 7

• y = 14

• y = 1/7

Rudolfo has 15 toys in his toy box, and he adds 2 new toys every month. Based on this information, which representation best shows this relationship between the number of toys Rudolfo has in his toy box, y, and the number of months that have passed, x?

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Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Which of the following tables represents a function?

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CCSS.8.F.A.1

The total cost of admission to an amusement park, y, is based on the number of tickets purchased, x. If each ticket costs $20, which of the following represents this relationship?

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• y = 20x

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CCSS.8.EE.B.5

The total daily charge, y, for renting a car is $17.50 plus $0.25 per mile, x. Which of the following is a true statement about this situation?

• The situation is proportional because it has a constant rate of change.

• The situation is proportional because the graph representing this situation is a line.

• The situation is non-proportional because the equation is y = 0.25x + 17.5

• The situation is non-proportional because the point (0, 0) would be included in the graph of this situation

Tags

CCSS.8.EE.B.5

A relation contains the points in the table below.

(3, 325), (4, 400), (5, 500), (6, 550)

Which statement accurately describes this relation?

• The relation does not represent y as a function of x, because each value of x is associated with a single value of y.

• The relation represents y as a function of x, because one value of y is associated with two values of x.

• The relation does not represent y as a function of x, because one value of x is associated with two values of y.

• The relation represents y as a function of x, because each value of x is associated with a single value of y.

Tags

CCSS.8.F.A.1