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1. |
The relation {(4, 6), (6, 1), (10, 2), (5, -1), (10, -2), (2, 6)} is _______. |
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A. |
not a function, because the domain value 10 is paired with more than one element of the range |
B. |
a function, because all of the elements of the domain are positive |
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C. |
a function, because each element of the domain is paired with exactly one element of the range |
D. |
not a function, because the range value 6 is paired with more than one element of the domain |
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Hint |
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2. |
Which graph does not represent a function? |
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A. |
 |
B. |
 |
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C. |
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D. |
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Hint |
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3. |
If f(x) = -5x + 8, find f(-1). |
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A. |
13 |
B. |
3 |
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C. |
2 |
D. |
40 |
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Hint |
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4. |
If f(x) = 4x – 3, find f(j + 2). |
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A. |
4j + 5 |
B. |
4j – 1 |
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C. |
4j + 11 |
D. |
4j – 3 |
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Hint |
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5. |
In physics the equation F = ma means ''force equals mass times acceleration.'' The acceleration of a freely falling object is 9.8 m/s2. Use the function F(m) = 9.8m to find the force in Newtons (N) of a freely falling object with a mass of 14 g. |
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A. |
8.2 N |
B. |
23.8 N |
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C. |
137.2 N |
D. |
1.43 N |
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Hint |
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