Hey there! In this equation, we see that the slope is 3, as it's the coefficient of x. In order to get a perpendicular slope, we use the opposite of the reciprocal of our slope. Therefore, we have: The reciprocal of 3/1 = 1/3 Opposite: -1/3 That's our slope. To check, just multiply the original slope by the perpendicular slope and you should always get negative one. :) Hope this helps!