Question

Which of the following relations does not represent a function?

a- {(0,0), (1,3), (2,3), (4,6), (5,-6)}
b- {(0,2), (1,2), (2,1), (3,0), (4,1)}
c- {(0,0), (2,2), (4,4), (2,-4), (5,0)}
d- {(0,1), (1,3), (2,4), (3,5), (-2,0)}

Answer 1

C because the x of 2 has two y-value meaning it is not a function