Use the slopes to determine if the line between the points (3, 5) and (-2, 7) is parallel, perpendicular or neither to a line that passes through the points (10,5) and (6, 15)

Question

a) Parallel
b) Perpendicular
c) Neither

Answer 1

so, can you not figure the slopes?
The first has slope (7-5)/(-2-3) = -2/5
you do the other, and then recall that

parallel lines have equal slopes
perpendicular lines have slopes whose product is -1