Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - 5-7 Scatter Plots and Trend Lines - Practice and Problem-Solving Exercises - Page 339: 20

Answer

a) Please see the graph attached. b) Please see the graph below (under the 'work step by step' area)., $y= .9067*x+18173$ c) 154,178,000 females d) It would be unreasonable to use the scatterplot to predict the male population.
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Work Step by Step

a) The graph was made in Microsoft Excel. b) The trend line was created in Microsoft Excel. c) $y = .9067*x +18173$ $y = .9067 *150000+18173$ $y = 136005 + 18173$ $y = 154178$ d) The $r^2$ value for the scatterplot is .9997, which means there is a very strong (almost completely linear) correlation between the year and the values. However, 2035 is some time out from 2006, so the coefficient might drastically change in that timeframe.
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