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.