A company manufactures notebook computers. Its marketing research department, using statistical techniques, collected the data shown in Table 9, where p is the wholesale price per computer at which x thousand computers can be sold. Using special analytical techniques
P(x) = 2,000 - 60x 1 ‰¤ x ‰¤ 25

(A) Plot the data points in Table 9, and sketch a graph of the price-demand function in the same coordinate system.
(B) What would be the estimated price per computer for a demand of 11,000 computers? For a demand of 18,000 computers?

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Table 9 Price-Demand r (Thousands) p (S) 1.940 1,520 1,040 740 16