The Basics of Functions (Leaving Cert Mathematics): Quizzes

One output for each input

Input, rule, output

Set of all possible input values

Set of all actual output values

Yes, each input has one output

Input 3 has two outputs

$f(x)=2x+4$, $f:x\to 2x+4$, $y=2x+4$

10

Range is a subset of codomain

5

Each input maps to exactly one output

{-2, 1, 4}