Question

given that line L1 has a slope of m1 = -5/2. Determine the slipe of line L2 if lines L1 and L2 is perpendicular

Answer 1

lines that are pendicular has slopes that multiply to -1

if m1=-5/2, then m2 times m1=-1
-5/2 times ?=-1
times both sides by -2/5
?=2/5

m2=2/5

the slope of line 2 is 2/5