Answer
See the graph
Work Step by Step
We are given: $y=-2x^2-1$
Make a table of values.
$x=-1 \rightarrow y=-3$
$x=0 \rightarrow y=-1$
$x=1 \rightarrow y=-3$
The vertex is $(0,-1)$. It is a maximum.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - 9-1 Quadratic Graphs and Their Properties - Lesson Check - Page 549: 4
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