First, find the slope perpendicular to . We can do this by finding the opposite reciprocal.
Multiply the slope by and write the result as a fraction.
Flip the numerator and the denominator.
This is the slope of line . Since lines and are perpendicular, this is also the slope of line .
Write the formula for point-slope form.
Substitute in the values for line .
Simplify the negative subtraction.
Distribute the to the .
Subtract — which is equivalent to — from both sides.