Marketing surveys conducted by the sales manager for a company determined that 3,000 power drills could be sold for $60 each, but 4,000 drills could be sold for $50 each. (a) If the two data points were plotted on a coordinate system with the number of drills sold on the horizontal axis and the price of each drill on the vertical axis, what is the slope of the line between the two points?

Micro Economics For Today
10th Edition
ISBN:9781337613064
Author:Tucker, Irvin B.
Publisher:Tucker, Irvin B.
Chapter1: Introducing The Economic Way Of Thinking
Section1.A: Applying Graphs To Economics
Problem 7SQ
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Marketing surveys conducted by the sales manager for a company determined that 3,000 power drills could be sold for $60 each, but 4,000 drills could be sold for $50 each.
(a)
If the two data points were plotted on a coordinate system with the number of drills sold on the horizontal axis and the price of each drill on the vertical axis, what is the slope of the line between the two points?
 
(b)
Write a sentence that explains the result in part (a) in the context of this problem.
For every additional drill sold, the price per drill (in cents) decreases by  cent(s).
(c)
Assuming the trend in part (a) continues, how many drills can be sold for $56?
 drills 
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