Answer:
10. YES
9. YES
8. NO
7. YES
6. YES
5. NO
4. NO
3. NO
2. YES
1. YES
Step-by-step explanation:
10. This is what is known as direct variation, which is an automatic "yes" because when using the Vertical Line Test, they all touch x at exactly ONE POINT.
9. Since they have two unique x-coordinates, this is an automatic "yes".
8. Obviously, if there are relations with a multitude of exact replicas of x, this is an automatic "no".
7. See explanation #9
6. This is a linear graph, therefore it is a function.
5. This is DEFINITELY NOT a function because although this is linear at 2 = x, it acts as a Vertical Line Test, and it touches EVERY x, so this is not a function.
4. We can tell that this is not a function because again, each time under every line, it touches another x.
3. When mapping, make sure two arrows do not come from an x-coordinate, which in this case does. Anytime this happens, automatically, this is not a function.
2. Using the Vertical Line Test, they all touch at exactly ONE POINT.
1. See explanation #2
I hope this helps you out alot, and as always, I am joyous to assist anyone at any time.
