Determine whether the graph is the graph of a function.
A. Not a function
B. Function
Answer: A
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Use exponential regression to provide an approximate model for the following data. Round your answer to two decimal places. t 1.80 4.50 6.98 9.70 11.97 y 19.83 14.03 10.03 7.67 5.59?
A. ?
B. 
C. ?
D. ?
Refer to the double-bar graph below which shows the number of male (M) and female (F) athletes at a university over a four-year period. Solve the problem. 
YEARFind the increase in the number of female athletes from 1986 to 1987.
A. 50 B. 100 C. 200 D. 75
Factor the trigonometric expression and simplify.sec4x - 2 sec2x tan2x + tan4x
A. 1 B. sec2x + tan2x C. sec2x (1 + tan2x) D. 2
Solve the problem.A person is pulling a freight cart with a force of 51 pounds. How much work is done in moving the cart 80 feet if the cart's handle makes an angle of 16° with the ground?
A. 1124.6 ft-lb B. 112.5 ft-lb C. 4005 ft-lb D. 3921.9 ft-lb