Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 9 Quadratic Relations and Conic Sections - 9.5 Graph and Write Equations of Hyperbolas - 9.5 Exercises - Skill Practice - Page 645: 4

Answer

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Work Step by Step

Rewrite the equation in standard form $$\frac{x^2}{9}-\frac{y^2}{36}=1$$ The denominator of $x^2$ is bigger than $y^2$, so the transverse axis is horizontal. Identify the vertices, foci, and asymptotes. Note that $a=3$ and $b=6$. The $y^2-term$ is positive, so the transverse axis is vertical and the vertices are at $(\pm 3,0)$. Find the foci: $c^2=a^2+b^2=3^2+6^2=45\\ \rightarrow c=3\sqrt 5$ The foci are at $(\pm 3\sqrt 5,0)$ The asymptotes are $y=\pm 2x$ Draw the hyperbola.
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