Use the graph of f to determine the intervals where f is increasing and where f is decreasing.
A. increasing: [-2, 1]; decreasing: (-?, -2] ? [1, ?)
B. increasing: [-2, 0] ? [1, ?); decreasing: (-?, -2] ? [0, 1]
C. increasing: [-2, ?); decreasing: (-?, -2]
D. increasing: [0, ?); decreasing: (-?, 0]
Answer: B
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The following table shows net income I of an art dealer when he pays for supplies and sells n items. Find a linear model for net income as a function of number of items sold. Round your answer to two decimal places, if necessary. x 3 4 5 6 y 6 33 60 87?
A. 
B. ?
C. ?
D. ?
Round to the nearest thousand.15,171
A. 15,100 B. 25,000 C. 15,000 D. 16,000
Using the variable x, write the interval as an inequality.
A. x ? 6 B. x < 6 C. x > 6 D. x ? 6
?Find the second derivative for the function 
and solve the equation 
.
?
A. ?-2 B. ?1 C. ?0 D. ?26 E. ?33