Answer:
A simple definition for a function in math is a relation between two quantities that has exactly one output value for each input value.
Explanation:
Some other definitions you may need to know to understand the function definition is an input is a value that is put into a relation and an output is a value that results from putting an input into a relation. Lastly, a relation is a relationship between two sets of values, inputs, and outputs.
I hope this helps you! :)