Question

What is the equation of the line perpendicular to negative x plus y equals seven and passing through (-1 -1 )?

Answer 1

Hello:
the equation is : y = ax+b
the slope is a : a×(1) = -1......( perpendicular to a line : -x+y = 7 or y =x+7 with a slope of 1)
a =-1 y=-x+b
the line that passes through (-1, -1) : -1 =- (-1)+b
b =-2
the equation is : y =-x-2