Function from a table
The question
x19558y2033456
(19, 20) (5, 3) (5, 34) (8, 56)
Is this a function?
x: 19, 5, 5, 8 y: 20, 3, 34, 56
How it works.
x19558y2033456
x19558y2033456inputs19558
x19558y2033456inputs19558
5 → 3 and 5 → 34
Not a function
- 01
In a function, every input has exactly one output. So check the inputs — the top row of the table.
- 02
The inputs are 19, 5, 5, 8.
- 03
5 is in that list twice, and the two pairs it belongs to do not agree: the input 5 goes to 3 and also to 34, and one input may only go to one place.
- 04
One input, two different outputs, so this relation is not a function.