Question

Given that line s is perpendicular to line t, which statements must be true of the two lines? Check all that apply. Lines s and t have slopes that are opposite reciprocals. Lines s and t have the same slope. The product of the slopes of s and t is equal to -1. The lines have the same steepness. The lines have different y intercepts. The lines never intersect. The intersection of s and t forms right angle. If the slope of s is 6, the slope of t is 6.

Answer 1

"Lines s and t have slopes that are opposite reciprocals."  In your shoes I'd write that as "Lines s and t have slopes that are negative reciprocals of one another."