Find the slope and y-intercept

Question

x=-9

a) slope:0;y-intercept: (0,-9)
b) slope: undefined; y-intercept:
(0,-9)
c) slope: 0;y-intercept:none
c) slope: undefined;y-intercept:none

Answer 1

could you tell me what YOU think the answer might be?

Answer 2

answer a

Answer 3

you got it