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Mathematics 7 Online
OpenStudy (anonymous):

Let c be any constant number. Which of the following will always be perpendicular to −4x + y = −2?

OpenStudy (asnaseer):

the product of the slopes of two perpendicular lines is always -1. you should be able to use that to solve your problem.

OpenStudy (anonymous):

Put your equation into slope intercept form. The slope of the perpendicular line will be -1/m.

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