Answer:
5)
6) Undefined 7)
8)
Explanation:
So I explained undefined lines already (they can be going horizontal or vertical btw)
5) They actually give you points so it will be a lot easier. Start at your one on the left because its a positive line so our rise over run should be going right, so we will start left to right. Anyways, Take that point and count up to the line where the second one is sat, then count from their over to the second point. So, when the second number isnt 1, you will have a slope in fraction form, do not simplify. Its a simple concept just hard to explain. Your top number will be the number you conted from the first point up or down. Take this explanation to the other ones
Im not sure if you saw the comment but Ill update the answer. 9 is -
(negative) 10 is (negative)