Question

Which of the following statements are true regarding functions?

Check all that apply.

A. The horizontal line test may be used to determine whether a function is one-to-one.
B. A sequence is a function whose domain is the set of real numbers.
C. A function is a relation in which each value of the input variable is paired with exactly one value of the output variable.
D. The vertical line test may be used to determine whether a function is one-to-one.

Answer 1

B is wrong

Answer 2

as is D

Answer 3

is c wrong i feel like a relation is different from a function?

Answer 4

a sequence is a function whose domain is non-negative integers. vertical line test determines whether the graph represents a function

Answer 5

no a function is usually considered a specific type of relation, namely one where the condition given above is satisfied. each input corresponds to one output

Answer 6

so a and c are correct?