Question

The mapping shows a relationship between input and output values.

Which ordered pair could be removed to make this relation a function?
(–5, 0)
(–1, –3)
(4, –2)
(6, –1)

Answer 1

C: (4, -2)

Step-by-step explanation:

edg2021

A function can not have one x value(input) matched with more than one y value(output). In this specific example, 4 is with -2 and 2, so if we get rid of the ordered pair 4, -2, the 4 (x value) is only matched to one other y value (2).

Answer 2

At first glance, a function looks just like a relation. Like a relation, a function has a domain and range made up of the x and y values of ordered pairs. A test known as vertical line test is used to know if the relation is a function, since the given data has different y values then it can already form a relation function without omitting a single point.