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1. |
Find the equation of the axis of symmetry of the graph of
y = 2x2 - 8x + 5. |
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A. |
x = 2 |
B. |
x = -2 |
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C. |
x = 4 |
D. |
x = -4 |
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Hint |
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2. |
Which is the graph of the equation y = 2x2 - 1? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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3. |
Solve x2 – 6x + 5 = 0 by graphing. |
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A. |
1 |
B. |
5 |
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C. |
1, 5 |
D. |
-1 |
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Hint |
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4. |
The equation x2 + 1 = -3x does not have integral roots. State the consecutive integers between which the roots lie. |
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A. |
between -3 and -2 and between 0 and 1 |
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B. |
between -1 and 0 and between 0 and 1 |
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C. |
between -3 and -2 and between -1 and 0 |
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D. |
between 0 and 1 and between 2 and 3 |
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Hint |
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5. |
Use the quadratic formula to solve x2 + 2x - 8 = 0. |
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A. |
-4, -2 |
B. |
-4 |
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C. |
-4, 2 |
D. |
-2 |
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Hint |
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6. |
Use the quadratic formula to solve 2x2 + 7x + 4 = 0. Approximate the solutions to the nearest hundredth. |
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A. |
1.28, 3.66 |
B. |
-3.35, -0.15 |
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C. |
-5.56, -1.44 |
D. |
-2.78, -0.72 |
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Hint |
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7. |
Which is the graph of y = 2.5x? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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8. |
Which equation represents exponential decay? |
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A. |
y = 1.05(0.95)x |
B. |
y = 2.62(1.22)x |
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C. |
y = 0.86(1.46)x |
D. |
y = 1.7(1.06)x |
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Hint |
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9. |
Solve 2z2 + z - 4 = 0 by completing the square. |
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A. |
 |
B. |
 |
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C. |
 |
D. |
-2, 1 |
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Hint |
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10. |
Solve x2 – 16x – 17 = 0 by completing the square. |
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A. |
{–1, 13} |
B. |
{1, 17} |
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C. |
{–1, 17} |
D. |
{1, 13} |
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Hint |
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11. |
Given the coordinates (0, 3), (1, 11), (2, 19), (3, 27), would a graph of these points exhibit exponential behavior? |
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A. |
yes, exponential and linear behavior |
B. |
no, it would display linear behavior |
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C. |
yes, exponential behavior only |
D. |
no, it would not display exponential or linear behavior |
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Hint |
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12. |
Each year, new computers are built with better technology, making older ones less valuable. If the computers looses value at a rate of 20% per year, how much will a $1500 computer be worth in ten years? |
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A. |
near $0 |
B. |
$9,287.60 |
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C. |
$161.06 |
D. |
$1,200 |
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Hint |
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13. |
What is the eighth term of the geometric sequence whose first three terms are 3, 6, and 12? |
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A. |
128 |
B. |
256 |
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C. |
384 |
D. |
768 |
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Hint |
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14. |
Find the geometric mean in the sequence 4, , 196. |
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A. |
28 or –28 |
B. |
7 or –7 |
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C. |
7 only |
D. |
28 only |
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Hint |
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