Functions Unit Test

Which relation is not a function?

1) {(1,5),(2,6),(3,6),(4,7)}

2) {(4,7),(2,1),(−3,6),(3,4)}

3) {(−1,6),(1,3),(2,5),(1,7)}

4) {(−1,2),(0,5),(5,0),(2,−1)}

• Choice 1

• Choice 2

• Choice 3

• Choice 4

Which relation is a function?

1) {(2,1),(3,1),(4,1),(5,1)}

2) {(1,2),(1,3),(1,4),(1,5)}

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

4) {(1,6),(2,8),(3,9),(3,12)}

• Choice 1

• Choice 2

• Choice 3

• Choice 4

Based on the mapping diagram, the mapping is:

1) a function, because Feb has two outputs, 28 and 29

2) a function, because two inputs, Jan and Mar, result in the output 31

3) not a function, because Feb has two outputs, 28 and 29

4) not a function, because two inputs, Jan and Mar, result in the output 31

• Choice 1

• Choice 2

• Choice 3

• Choice 4

Which relation does not represent a function?

• Choice 1

• Choice 2

• Choice 3

• Choice 4

Which table could represent a function?

• Choice 1

• Choice 2

• Choice 3

• Choice 4

If included in the table, which ordered pair,(-4,1) or , (1,-4) would result in a relation that is no longer a function? Explain your answer

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• A

• B

• C

• D

Show your work or explain in words how you calculated the answer

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Lynn, Jude, and Anne were given the function f(x) =5x^2-10 , and they were asked to find  f(6). Lynn's answer was 140, Jude's answer was 20, and Anne's answer was 120. Who is correct?

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• Linear

• Quadratic

• Exponential