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KIM [24]
3 years ago
10

Which is the slope of a line that is perpendicular to the line represented by the equation x-y = 8

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0

Answer:

-1

Step-by-step explanation:   from the equation,  x-y=8,  make  y the subject of the formulae , this gives - y=  -x +8

divide all through by (-) sign, this gives   y= x - 8

from the last equation above, the slope is the coefficient of x which is 1. since it is perpendicula, the answer is -1

by co efficient, we mean the number multiplying the unknown

aliya0001 [1]3 years ago
3 0

Answer:

D

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Rearrange x - y = 8 into this form by subtracting x from both sides

- y = - x + 8 ( multiply through by - 1 )

y = x - 8 ← in slope- intercept form

with slope m = 1

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = -  \frac{1}{1} = - 1 → D

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