Determine whether the pair of lines are parallel, perpendicular, or neither.
1)f(x)=2/3x+1
2)2y+3x=1
slope of first is 2/3
second is
y = -3 x/2 + 1/2
slope = m' = -3/2
the slope of the second is negative the inverse of the slope of the first, so they are perpendicular
m' = -1/m