PRICES OF Z-PHONES У BASED ON AGE 500 450 %S4 400 350 300 250 200 150 100 50 0 3 6 9 12 15 18 21 24 27 30 33 Age (in months) Price (in dollars)

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter4: Writing Linear Equations
Section4.5: Analyzing Lines Of Fit
Problem 25E
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An electronics store sells new and used Z-phones. The store manager made the scatter plot below to show the selling prices of used Z-phones and their ages, in months

If these data are modeled by the line y=-10x+410, which best describes a valid prediction the manager could make, based on the data
A.If the store sells a Z-phone that is 30 months old, it will probably sell for only $50
B.If the store sells a brand-new Z-phone, it can expect a customer to pay about $410
C.For every one-month increase in phone age, the price a customer will pay increases by about $10
D.For every one-year increase in phone age, the price a customer will pay decreases by about $10

PRICES OF Z-PHONES
У
BASED ON AGE
500
450
%S4
400
350
300
250
200
150
100
50
0 3 6 9 12 15 18 21 24 27 30 33
Age (in months)
Price (in dollars)
Transcribed Image Text:PRICES OF Z-PHONES У BASED ON AGE 500 450 %S4 400 350 300 250 200 150 100 50 0 3 6 9 12 15 18 21 24 27 30 33 Age (in months) Price (in dollars)
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