6. State whether the graph of each quadratic relation opens upward or downward. Explain how you know. a) y=x²-1 b) y = -x² + 5x c) y = −2+². d) y = -9x + +6x-4 2 c² +6
6. State whether the graph of each quadratic relation opens upward or downward. Explain how you know. a) y=x²-1 b) y = -x² + 5x c) y = −2+². d) y = -9x + +6x-4 2 c² +6
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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could you please give a detailed explanation on how you could tell if a quadratic relation opens upward or downward just by looking at the equation as well?

Transcribed Image Text:6. State whether the graph of each quadratic relation opens upward or
downward. Explain how you know.
a)
y = x² - 1
b) y = -x² + 5x
c) y = -1/2+²
d) y = -9x +
+6x4
2
c² +6
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