Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.4 Linear Inequalities in Two Variables - Exercise Set 7.4 - Page 454: 47

Answer

No

Work Step by Step

Model of the healthy weight region given by the following system of linear inequalities, where x represents height, in inches, y represents weight, in pounds. \[\left\{ \begin{align} & 5.3x-y\ge 180 \\ & 4.1x-y\le 140 \\ \end{align} \right.\] A person is 72=\[\left( 6\times 12 \right)\] inches tall weighing 205 pounds. Substitute\[x=72\] and\[y=205\] values in the above system, \[\left\{ \begin{align} & 176.6\ge 180 \\ & 90.2\le 140 \\ \end{align} \right.\] Since Equation 1 in the system is false. So, the provided parameters of a person don’t satisfy the system,it is not within healthy weight region. This can also be seen from the graph that its location is outside the region.
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