Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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Use the graph or table to write a linear function that relates y to
x.
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1.
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a. | y =  x | c. | y =  x | b. | y =  x | d. | y =  x |
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2.
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a. | y =  x – 6 | c. | y =  x
– 6 | b. | y =  x + 6 | d. | y =  x +
6 |
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3.
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a. | y =  x + 3 | c. | y =  x
– 3 | b. | y =  x – 3 | d. | y =  x +
3 |
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4.
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a. | y =  x + 2 | c. | y =  x
– 2 | b. | y =  x + 2 | d. | y =  x –
2 |
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5.
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a. | y = –2 | c. | y = x – 2 | b. | x = y
– 2 | d. | x =
–2 |
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6.
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Which equation does not belong with the other three?
a. | 11 = 3xy | c. | 22y =
6x | b. | y =  x | d. | 11y =
3x |
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Short Answer
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1.
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Describe four ways to represent a function.
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2.
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Is the function represented by the graph a linear function? Explain. 
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Graph the data in the table. Decide whether the function is linear or
nonlinear.
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3.
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Does the table or graph represent a linear or nonlinear
function? Explain.
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4.
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Does the equation represent a linear or nonlinear function?
Explain.
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5.
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3 + xy = 8x – y
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6.
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The table shows the height x (in feet) and number y of stories of
four buildings. Does the table represent a linear or nonlinear function?
Explain. Building | Height, x | Stories,
y | | Sears Tower, Chicago | 1450 | 110 | | Empire State Building,
New York | 1250 | 102 | | Aon Center,
Chicago | 1136 | 80 | | Chrysler Building, New
York | 1046 | 77 | | | |
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