Question

Which of the following statements are not true regarding functions (Choose all that apply)
A.) The vertical line test may be used to determine whether a function is one to one.
B.) A series is a function whose domain is the set of natural number.
C.) A function is a relation in which each value of the input variable is paired with a least one value of the output variable.
D.) The horizontal line test may be used to determine whether a function is one to one.