Question

What is the equation of the line perpendicular to –x + y = 7 and passing through (-1, -1)?

Answer 1

-x + y = 2
-x – y = 2
x – y = 2
-x – y = 0
x + y = 0

theses are the choices

Answer 2

r.i.p queenie, death by typing a reply. 2016

Answer 3

-x + y = 7
y = x + 7...the slope of this line is 1 or 1/1.....a perpendicular line will have a negative reciprocal slope. All that means is flip the slope and change the sign. So the perpendicular slope we need is -1.

now we use y = mx + b....(-1,-1)...x = -1 and y = -1
slope(m) = -1
now we sub and find b, the y intercept.

y = mx + b
-1 = -1(-1) + b
-1 = 1 + b
-1 - 1 = b
-2 = b

so ur perpendicular line will be : y = -x -2 or x + y = -2 or -x - y = 2

Answer 4

sorry it took so long....I couldn't get my answer to match ur answer choices....finally got it and it is -x - y = 2

Answer 5

thank you queenie

Answer 6

lol....yw