Question

Write an equation of a line that passes through the point (1,2) and is perpendicular to the line y=−1/4x+2.

Answer 1

Correct option is B)

Explanation:

Equation of the line perpendicular to the line x+y+1=0 is x−y+c=0 Since this line passes to (1,2)

So,

1−2+c=0

−1+c=0

c=1

Hence required equation of the line is

x−y+1=0

⇒y−x−1=0

Hope this Helped!!!