## Algebra 1

Published by Prentice Hall

# 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. #### 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. After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.