Question

Which pair of slopes could represent perpendicular lines?

1/7, 7
1/2, 2/4
-3/4, 4/3
1/3, 1/3

Answer 1

pair whose product = -1 will represent perpendicular lines

Answer 2

@AquaStone316 ...only one option is their

Answer 3

Why not look up "perpendicular lines" on the 'Net? You'll almost surely find the relationship between the slopes of a line and a line perpendicular to the first line that way. It's important that you learn the principle behind this.

Answer 4

@gorv so it's C?

Answer 5

Look up http://www.mathsisfun.com/algebra/line-parallel-perpendicular.html

and search for "Perpendicular Lines" in that document.