Question

Which of these graphs represents a function?
A)
B)
C)
D)

Answer 1

The answer of your question is C. because it touches once try using a pencil if the line touch the pencil twice then it's not a function :)

Answer 2

C) Is the only graph that is a function because A) is a connection of points, B) is a polar graph, and D) has imaginary solutions.