Question

What does 0 slope mean and undefined slope mean

Answer 1

0 slope mean when you have equation like this y = b where you only have y-intercept and graph look like this

Answer 2

vetical when undefined

Answer 3

Ok thanks now what does y=0 or x=0

Answer 4

lets start slowly.
A slope is the number of units that y goes up, as x goes 1 unit to the right.

When the line is horizontal this number is 0, and when it is vertical, the word "slope" is irrelevant, inapplicable.

Answer 5

when you have zero
horizontal