How do you write an equation of a line through (1, -3) and perpendicular to y=1/2x +4?
First find the slope
Slopes of perpendicular equations are the opposite reciprocals of the original slope
Original slope =
Perpendicular slope =
See how it is the reciprocal of the original slope and the opposite sign of the original slope.
Then plug in the points you want this line to pass through, in this case it is
Rewrite equation in
The Perpendicular equation is: