Algebra 1

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

Chapter 4 - An Introduction to Functions - 4-1 Using Graphs to Relate Two Quantities - Lesson Check - Page 243: 1

Answer

See attached graphs:
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Work Step by Step

Graph the points for each problem and you will notice that the points form a type of line: a) The line is increasing, as the x- and y-values are directly proportional to each other. This means that the slope is positive. b) The line is decreasing, as the x- and y- values are inversely proportional to each other. This means that the slope is negative. c) The line is vertical which creates an undefined slope.
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