Question

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

-x + y = 2

-x – y = 2

x – y = 2

-x – y = 0

x + y = 0

Answer 1

@mathstudent55 ?

Answer 2

y=x+7
its slope m=1 (y=mx+c)
slope of line perpendicular to above line=-1/1=-1 (-1/m)
eq. of any line with slope -1 is
y=-1x+c (y=mx+c)
because it passes through (-1,-1) so
-1=-1*-1+c,
c=-2
?

Answer 3

if you were to solve " -x + y = 7 " for "y", what would it look like?