Math 110 Test 1

The graph of y = f (x) is given below.

For problems 9 - 12 choose the equation that yields the given graph.

Answer the following questions for the quadratic function f (x) = -2x² + 8x + 5 whose
graph is a parabola

13. The graph of the function opens:
A. Up
B. Down

14. What is the vertex of the parabola ?
A. (-2,-19)
B. (-2,-5)
C. (2,13)
D. (0,5)

15. What is the equation of the axis of symmetry for the function?
A. x = 2
B. x = -2
C. x = 4
D. x = -4

16. What is y- intercept of the function ?
A. -2
B. 8
C. 5
D. 2

17. How many x- intercepts does the function have?
A. None
B. 1
C. 2
D. 3

18. What is the domain of the function?
A. {x | x ≥2}
B. {x | x ≤ 2}
C. All positive numbers
D. All real numbers

19. What is the range of the function?
A. {y | y ≥ -19}
B. {y | y ≤ -5}
C. {y | y ≤13}
D. {y | y ≤ 8}

20. What is the largest interval on which the function is increasing?
A. (-∞,-2)
B. (-2,∞)
C. (-∞,2)
D. (2,∞)

Answers:
1. D
2. G
3. B
4. E
5. H
6. C
7. F
8. A
9. D
10. A
11. D
12. E
13. B
14. C
15. A
16. C
17. C
18. D
19. C
20. C