Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - 1.1 - Graphs of Equations - 1.1 Exercises - Page 79: 38

Answer

There is no axis or origin symmetry. y-intercept: $(0,-3)$ x-intercept: $(1.5,0)$ Graph:

Work Step by Step

(a) To test for x-axis symmetry, replace $y$ with $-y$ (b) To test for y-axis symmetry, replace $x$ with $-x$ (c) To test for origin symmetry, replace x with $-x$ and y with $-y$ and see if you obtain the same equation. (a) $-y=2x+3$ ... is not the same equation. (b) $y=2(-x)+3$ $y=-2x+3$ ... is not the same equation. (c) $-y=2(-x)+3$ $-y=-2x+3$ $y=2x-3 $ ... is not the same equation. There is no axis or origin symmetry. Intercepts: $\left[\begin{array}{ll} \text{y-intercept} & \text{x-intercept}\\ x=0 & y=0\\ y=0-3 & 0=2x-3\\ y=-3 & 3=2x\\ (0,-3) & x=3/2\\ & (1.5,0) \end{array}\right]$ The equation is linear. Plot the intercepts and draw a line through them.
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