College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 2 - Section 2.4 - Circles - 2.4 Assess Your Understanding - Page 188: 61

Answer

(b), (c), (e), (g)

Work Step by Step

Observation from circle * Center say (a, b) in 1st Quadrant so, so both a and b must be positive This criteria rules out options $(a)\ (x - 2)^2 + (y + 3)^2 = 13$ $(d)\ (x +2)^2 + (y - 2)^2 = 8$ $(f)\ x^2 + y^2 + 4x - 2y = 0$ * Also circle passes through origin so $r^2 = a^2 +b^2$ This rules out option $(h)\ x^2 + y^2 - 4x - 4y = 4$
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