Take Home Test #2

A radar device has an antenna that revolves at a constant rate. The graph shows the number of revolutions the device will make over time. Which table shows the data for an antenna that revolves at exactly twice the rate of the antenna described in the graph.

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Functions W and Z are both linear functions of x . Which statement comparing the functions is true?

• The slope of Function W is equal to the slope of Function Z

• The slope of Function W is less than the slope of Function Z

• The y-intercept of Functions W is equal to the the y-intercept of Function Z

• The y-intercept of Function W is less than the y-intercept of Function Z.

Which function of x has the least value for the y-intercept?

• y = -4x + 15

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• y = 2x - 3

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In city W, the average cost for a gym membership is given by the equation y = 34.99x + 49, where y is the total cost, in dollars, for x months of membership. What is the meaning of the y-value when x = 1?

• the average sign-up fee for a gym membership

• the average monthly charge for a gym membership

• the average total cost for the first month of a gym memebership

• the average total cost for the first two months of a gym membership

Kevin and Christy both saved money for their class trip. Kevin saved the same amount each week. The total amount that Kevin saved at the end of every two weeks is shown int he table below.

Christy's savings can be modeled by the equation y = 26x, where y is the total amount of money saved in x weeks. Which statement correctly compared the rates at which Kevin and Christy saved money?

• Christy saved $3 per week more than Kevin

• Kevin saved $10 per week more than Christy

• Christy saved $18 per week more than Kevin

• Kevin saved $20 per week more than Christy

In each table, x represents the input value and the y represents the output value. Which table does not represent a function of x?

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Which set of ordered pairs (x,y) could represent a linear function?

• {(-2,8), (0,4), (2,3), (4,2)}

• {(1,2), (1,2), (1,4), (1,5)}

• {(-2,7), (0,12), (2,17), (4, 22)}

• {(3,5), (4,7), (3,9), (5,11)}

Which statement explains the type of function that is represented by the equation y = x²+9?

• The function is linear because it contains more than one term.

• The function is linear because the variable x is raised to the second power.

• The function is nonlinear because it contains more than one term.

• The function is nonlinear because the variable x is raised to the second power.

Which set of ordered pairs represents a function?

• {(2,7), (2,8), (3,8)}

• {(3, 2), (3,3), (3,4)}

• {(4,1), (5,1), (4,4)}

• {(5,6), (8,6), (9,6)}

A function has the following properties:

• It is increasing and linear when the value of x is between -5 and -3.
• It remains constant when the value of x is between -3 and 0.
• It is decreasing and linear when the value of x is between 0 and 3.
• It is increasing and nonlinear when the value of x is between 3 and 5.

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