The line equation in slope-intercept form is , where m is the slope

and b is the y-intercept.

If two lines are perpendicular, the slope () of one line is opposite reciprocal

of the second line slope (). It can be represented as, .

The slope of the line is 4.

So the line perpendicular to above equation has the slope .

Substitute (x₁, y₁) = (1, 1) and in the point-slope form equation.

                               (Substitute (x₁, y₁) and m values)

                        (Apply distributive property: )

                                         (Simplify)                    (Add 1 to each side)

                         (Apply additive inverse property: )

                                     (Apply additive identity property: )

                                   (Add: )

The required slope-intercept form of the line equation is .