Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3)
B. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0)
C. Local maximum at x = 3; local minimum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3)
D. Local minimum at x = 3; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0)
Answer: B
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The solution(s) to the equation x + 5 = x + 4 is/are 
.
A. unlike terms B. no solution C. all real numbers D. reversed
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Refer to the graph of the linear function defined by 
or the graph of the linear functions defined by 
and 
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f(x) ? 0
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Solve the equation by multiplying both sides by the LCD.
= 
A. 
B. 
C. 
D. 