Answer
center $(0,4)$, radius $r=5$
Work Step by Step
Rewrite the equation and form squares of $x,y$, we have $x^2+y^2-8y+16=16+9\longrightarrow (x)^2+(y-4)^2=25$. Thus, the equation represents a circle with center $(0,4)$, radius $r=5$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 2 - Graphs and Functions - Summary Exercises on Graphs, Circles, Functions, and Equations - Exercises - Page 248: 22
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