Of the following points, name all that lie on the same vertical line?
(1,9) (0,-8) (1,8) (1,-9)

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

the answer is b.

surface area: 169π

volume: 366π

i got it down.