Question

What's a function????

Answer 1

A relation of two or more numbers

One input one output

there can be more then one input for the same output

just not more then one output for one input

Answer 2

Answer: Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable). Functions are ubiquitous in mathematics and are essential for formulating physical relationships in the sciences.

Explanation: