Given that line s is perpendicular to line t, which statements must be true of the two lines? check all that apply.
a. lines s and t have slopes that are opposite reciprocals.
b. lines s and t have the same slope.
c. the product of the slopes of s and t is equal to -1
d. the lines have the same steepness.
e. the lines have different y intercepts.
f. the lines never intersect.
g. the intersection of s and t forms right angle.
h. if the slope of s is 6, the slope of t is -6

remember, it is check all that apply, so there will be multiple answers.