3 years ago

What is the slope of a line perpendicular to the line whose equation is 4x – y = 9.

1 answer:

5 0

ANSWER: -1/4

EXPLANATION:

4x-y=9

y=4x-9

(so slope/gradient of this line is 4 as y= mx+c and the coefficient of x here is 4)

(formula for perpendicular slopes) m1 multiplied by m2 = -1, where m= gradient

So, m1 x 4= -1

m of perp line= -1/4

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