Find the equation that the given graph represents and give the domain, range, and interval(s) over which the function is increasing and decreasing.
A. P(x) = -3x5 + x4 + 2x;
domain: (-?, ?); range: (-?, ?);
Increasing over (-?, -.09] and [.64, ?);
Decreasing over (-?, -3.69]
B. P(x) = 2x5 + x3 + 8x2 - 4x + 3;
domain: (-?, ?); range: [-9.45, ?);
Increasing over [.35, ?);
Decreasing over (-?, .35]
C. P(x) = -x4 + x3 - x;
domain: (-?, ?); range: (-?, ?);
Increasing over [1.79, ?);
Decreasing over (-?, 1.79]
D. P(x) = 2x4 + x3 - 3x2 - 6x;
domain: (-?, ?); range: [-6.02, ?);
Increasing over [1.05, ?);
Decreasing over (-?, 1.05]
Answer: D
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A. y ' = 
B. y ' = 
C. y ' = 
D. y ' = 
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A. 0
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D. Does not exist
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