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 rational
numbers.
C. A function is a relation in which multiple values of the input
variable are paired with at least one of the output variable.
D.The vertical line test may be used to determine whether a relation
is a function.

Answer 1

D

Explanation:

The vertical line test, can be done with a pencil, and it's very simple. You run the object in a vertical position, horizontally across the graph, and if it hits two points on the same Y-Axis, your function is actually a relation, since functions are not allowed to have two coordinates on the same line.