PLEASE HELP !!!!

does this graph represent a function? why or why not?

a. no, because it fails the vertical line test.

b. yes, because it is a curved line.

c. no, because it is not a straight line.

d. yes, because it passed the vertical line test.

PLEASE HELP does this graph represent a function why or why not a no because it fails the vertical line test b yes because it is a curved line c no because it i class=