## Precalculus (6th Edition) Blitzer

Published by Pearson

# Chapter 9 - Section 9.3 - The Parabola - Exercise Set - Page 997: 62

#### Answer

domain $(-\infty,-2]$, range $(-\infty, \infty)$, not a function.

#### Work Step by Step

Step 1. Rewriting the equation as $(y-1)^2=-\frac{1}{3}(x+2)$, we see that the parabola opens to the left with a vertex at $(-2,1)$. Step 2. We can find the domain as $(-\infty,-2]$ and range as $(-\infty, \infty)$ Step 3. The relation is not a function as it will fail a vertical line test.

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