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1. |
What is true about the graphs of y = 2x2 and y = -2x2? |
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A. |
y = 2x2 opens to the left and y = -2x2 opens to the right. |
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B. |
y = 2x2 opens to the right and y = -2x2 opens to the left. |
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C. |
y = 2x2 opens downward and y = -2x2 opens upward. |
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D. |
y = 2x2 opens upward and y = -2x2 opens downward. |
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Hint |
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2. |
Consider the function y = 2x2 + 3. Which ordered pairs from the set
{(-4, 35), (-3, 20), (-2, 11), (5, 52)} are solutions? |
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A. |
{(-4, 35), (-3, 20)} |
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B. |
{(-4, 35), (5, 52)} |
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C. |
{(-2, 11), (-3, 20)} |
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D. |
{(-4, 35), (-2, 11)} |
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Hint |
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3. |
If a rocket is fired from the ground with an initial velocity of 75 meters per second, then the height of the rocket after t seconds is h = 75t - 4.9t2. Find the height of the rocket after 3 seconds. |
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A. |
252.5 meters |
B. |
221.6 meters |
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C. |
130.4 meters |
D. |
180.9 meters |
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Hint |
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4. |
The greatest power in a quadratic function is ______. |
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A. |
2 |
B. |
4 |
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C. |
1 |
D. |
3 |
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Hint |
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5. |
The flight of a baseball thrown by a player is modeled by the equation
h = -16t2 + 50t + 6, where h is the height in feet and t is the time in seconds after the ball is thrown. How high is the ball 2.5 seconds after it is thrown? |
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A. |
42 feet |
B. |
37.5 feet |
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C. |
31 feet |
D. |
45 feet |
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Hint |
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