Evaluate the algebraic expression 
when 
, 
, and 
.
A. 
B. 
C. 
D. 
E. 
Answer: D
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Solve the problem.Find the point on the line 
that is closest to the origin.
A. 
B. 
C. 
D. 
Solve the application problem.Mark started his morning walk by going uphill for 5 minutes. Then for the next 5 minutes, he walked downhill to an elevation lower than his starting point. For the next 10 minutes, he walked on level ground. For the final 10 minutes, he walked uphill. Which graph matches the description of Mark's walk?
A. 
B. 
C. 
D. 
Write a formula for a linear function f that models the data exactly.
A. f(x) = 4x + 13 B. f(x) = 2x + 5 C. f(x) = -4x + 13 D. f(x) = -2x + 5
Determine the largest open intervals of the domain over which the function is increasing, decreasing, and constant.
A. Increasing (-?, 0); Decreasing (0, ?) B. Increasing (0, ?); Decreasing (-?, 0) C. Increasing (-?, 0); Decreasing (0, -?) D. Increasing (-?, 0); Decreasing (-?, 0)