3.6 Recap

To recap, we have seen that functions are simply rules. There are three ways to represent a function:

Graphically.

As a mathematical formula.

As a table.

Each has it's own advantages:

Graphically: good for presentation and qualitative descriptions.

Formula: good for mathematical manipulation to gain further insight.

Table: everything is pre-calculated, no new calculation necessary (e.g. fast computer look ups, tax tables).