Consider the line  −x-4y=−9 . What is the slope of a line parallel to this line? What is the slope of a line perpendicular to this line?

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Consider the line 

−x-4y=−9

.

What is the slope of a line parallel to this line?

What is the slope of a line perpendicular to this line?

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