Question

Help .. Medal

Answer 1

That is an undefined slope.

Answer 2

If a line is vertical it is always undefined.

Answer 3

@science00000 how about this type of one ?

Answer 4

THat is a positive slope, because the line is increasing from left to right.

Answer 5

@science00000 thank you :}

Answer 6

No problem!

Answer 7

Do you need to know the value of the slope?
For the second graph it is 1.