Which line has the same slope as the line passing through (-4,-1) and (-1,8)

Question

A) The line passing through (1,4) and (1,7)

B) 9x-3y=5

C) y=1/3x+5

D)y=3

Answer 1

B) is correct

the slope = 3 (8--1)/(-1--4) = 9/3 = 3

A has undefined slope 3/0

D has zero slope

C has slope = 1/3