a.) m = -1
b.) m = 0
c.) m = undefined
d.) m = 1/2
Answer (bolded part is slope):
a.) y = -x + 2 (slope = -1)
b.) y = -2 (slope = 0)
c.) x = 3 (slope = undefined)
d.) y = [tex]\frac{2}{3}[/tex]x + [tex]\frac{3}{2}[/tex] (slope = 2/3)