Question

The equation of the line passing through (1, 2) and perpendicular to x + y + 7 = 0 is :

Answer 1

Step-by-step explanation:

x + y + 7= 0

Thus y = -1*x -7

Therefore slope m = -1

Now using perpendicularity,

new slope is negative reciprocal

so m = 1

Point = (1,2) (Given)

Using point slope form,

y - 2=m(x - 1)

m=1

so y - 2 = x -1

Thus the equation of line is x - y + 1 = 0