Solve the problem.It costs $43 per hour plus a flat fee of $15 for a plumber to make a house call. Find a linear function 
whose input is the number of hours that the plumber works and whose output is the corresponding cost for the house call.
A. f(x) = 15x + 43
B. f(x) = 43x
C. f(x) = 15x
D. f(x) = 43x + 15
Answer: D
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For the following question(s), refer to the tournament digraph below. The vertices of the digraph represent five tennis players in a round-robin tournament. An arc XY represents the fact that X defeated Y in the tournament.
Which player won the tournament?
A. A B. B C. C D. D E. E
Perform the operation indicated. Simplify.
- 
- 
A. 
B. 
C. 
D. 
Find the indicated function.The length and width of a rectangle have a sum of 78. If x represents the width, what is a function to represent the area of the rectangle?
A. A(x) = x(78 - x) B. A(x) = (x - 78)(x - 78) C. A(x) = (78 - x)(78 - x) D. A(x) = x(x - 78)
Find an equation for the line with the given properties.Parallel to the line x - 2y = 7; containing the point (0, 0)
A. y = - 
x
B. y = 
x
C. y = 
x + 7
D. y = - 3