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1.
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Graph the function. 
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2.
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Graph the function. Identify the focus. 
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3.
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Write an equation of a parabola with a vertex at the origin and the given
focus. focus: (0,  )
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4.
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Graph the function. 
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5.
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Graph the function. 
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6.
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Find the vertex of the graph of the function.  a. | (–4, 2) | c. | (–4, 6) | b. | (4, –30) | d. | (4, –26) |
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7.
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Graph the function. 
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8.
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Graph the function. 
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9.
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Tell whether the graph below represents a linear, an exponential,
or a quadratic function.  a. | linear | b. | exponential | c. | quadratic |
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10.
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Extended Response An electronics store sells about 40 mp3 players per
month for $80 each. For each $3 decrease in price, the store expects to sell 6 more mp3
players. a. Write a quadratic function that represents the
revenue from mp3 player sales.
(Note: revenue = units
sold ´ unit price)
b.
How much should the store charge per mp3 player to maximize monthly revenue?
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