Use the vertical line test to determine whether or not the graph is a graph of a function.
A. No
B. Yes
Answer: B
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Find the linear approximation of the function at the given point.
at 
A. 
B. 
C. 
D. 
Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R
= 6xC
= 0.01x2 + 1.1x + 40.
A. 355 units B. 490 units C. 245 units D. 710 units
Solve the problem.Trains S and T are both traveling in the same direction. Their distances in miles North of Dallas after x hours are computed by the functions fS and fT, respectively, and their graphs are shown in the figure for 
(i) Which train is traveling slower? (ii) How many hours elapse before the two trains are the same distance from Dallas and how far are they from Dallas when this occurs? 
A. train S; 297 hours, 3.3 miles B. train S; 3.3 hours, 297 miles C. train T; 297 hours, 3.3 miles D. train T; 3.3 hours, 297 miles
Match the polar equation with its graph.r = 
A. 
B. 
C. 
D. 