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5. At a restaurant, the total bill and the percentage of the bill left as a tip is
represented in the scatter plot. (Lesson 3-4)
Percentage
32
28
24
20
16
12
8
4
4 8 12 16 20 24 28 32
Total
The best fit line is represented by the equation y = -0.632x + 27.1, where x
represents the total bill in dollars, and y represents the percentage of the
bill left as a tip.
a. What does the best fit line estimate for the percentage of the bill left as
a tip when the bill is $15? Is this reasonable?
b. What does the best fit line predict for the percentage of the bill left as a
tip when the bill is $50? Is this reasonable?
Sagot :
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