Question

Can someone please help me with a few problems??

Answer 1

It is 3 or aka C.

Answer 2

3rd option

Answer 3

Take you pencil hold it vertically to your paper. Does it intersect more than point at once?
If yes then it fail the test if no it passed.
Quick version is it passed the test :)

Answer 4

If it pass it MUST be a function.

Answer 5

Answer:
Since it passed the test its a function. When we tested the using the vertical line test we did not interest more than one point. Also since we proved it pass the test, The vertical line test states the it MUST be a function.

Read more get smart:
http://www.mathwords.com/v/vertical_line_test.htm

Answer 6

Happy to help :)