USE G O O G L E you will get your answer quicker than a jiffy on a stick:)
It is thirty percent (30%). there are ten tenths in one hundred. One tenth is equal to ten percent.
A (-5,0) B (0,-2) C (-3,-4)
Point A shows that she is incorrect.
With functions, you can perform the "straight line test through each point. If the line goes through both points, you know it's not a function.
If we plotted point A, it'd fail the straight line test because the given point (-6, 7) already has -6 as an x value.
Hope this helps!