Solve the problem.Kayla, a photographer, can produce prints of her photos at a cost of $3 per print, with a setup cost of $50 per run. She sells the prints for $9 each. Write an equation for the total revenue. Let R represent the total revenue and x represent the number of photos produced. Graph the equation by hand. Use the graph to determine the number of prints sold to obtain a revenue of $50. 
A. R = 3x + 50; -1 prints
B. R = 3x + 50; 0 prints
C. R = 9x; 3 prints
D. R = 9x; 5 prints
Answer: D
Mathematics
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