In this lesson, Naomi teaches how to find a line that is perpendicular to another given line and passes through a given point. First, she shows how to find the slope of the line that's given, which is just the coefficient of x. Then, she explains how to find the slope of the perpendicular line, which is the negative reciprocal of the given line's slope. Finally, she substitutes the values of the slope and the given point into the point-slope formula to obtain the equation of the slope.
An example of how to find a line perpendicular to a given line and through a given point. This one involves some fractions in the calculations as well.