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| answers: c c b b b b a c |
| 2.1
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| 1.Find f(2) for f(x) = 13 + x2
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a 9
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b14
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c17 |
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dnota |
| 2. find f(-2) + f(0) for the previous
problem |
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a 4 |
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b31 |
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c30 |
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dnota |
3. Is this a function ?
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ayes |
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bno |
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cmaybe |
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dnota |
4. Is this a function ?
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ayes |
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bno |
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cmaybe |
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dnota |
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5. Is this relationship a function ? {(1,2), (2,3) (2,-3), (3,4)} |
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a yes |
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bno |
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cnot
enough information to make a choice |
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2.2
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6. What is the domain of f(x) = -3x + 7 ?
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a. {x| x is not equal to -7/3}
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b. {x| x is any real number}
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c. {x| x is not equal to 0}
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d. nota
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7. What is the domain of f(x) = -1/(3x + 17) ?
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a. {x| x is not equal to -17/3}
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b. {x| x is any real number}
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c. {x| x is not equal to 17/3}
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d. nota
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8. What is the domain of f(x) = 1/(3x - 102) ?
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a. {x| x is not equal to -34}
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b. {x| x is any real number}
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c. {x| x is not equal to 34}
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d. nota
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written problems |
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9. f(x) = x2 + 4x and g(x) = 2 - x. Find
(f + g)(1) = 6 |
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10. For the previous problem , find (fg)(1) = f(1)·g(1) = 5 |
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2.3
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11. Consider a line whose graph is given by 3x = 5y + 15. What is
the x- intercept?
(5, 0) |
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12. Graph the linear function of the previous problem by drawing a line
through both the y-intercept and the x-intercept. Draw
a line through x-intercept (5, 0) and and y-intercept
(0, -3) |