College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 1, Equations and Graphs - Section 1.2 - Graphs of Equations in Two Variables; Circles - 1.2 Exercises - Page 103: 82



Work Step by Step

RECALL: The standard form of a circle whose center is at $(h, k)$ and radius $r$ is $(x-h)^2+(y-k)^2=r^2$. The graph shows that the circle has its center at $(-1, 1)$ and a radius of $3$ units. Thus, the equation of the circle is: $[x-(-1)]^2+(y-1)^2=3^2 \\(x+1)^2+(y-1)^2=9$
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