Question 45984
Remember that the slopes of perpendicular lines are the negative reciprocal of each other.

Since all of the possible answers are in the slope-intercept form y = mx+b, you can compare the slopes of the answers to find two slopes that are negative reciprocals.

b) {{{3x-5/3}}} The slope is 3
c) {{{(-1/3)x+5/3}}} The slope is {{{-1/3}}}, the negative reciprocal of 3