# Relationship

In mathematics as well as in real life one wants to assign certain interdependent variables to each other.

### Example

If we have the price of a kilo in the supermarket, we can easily extrapolate this.

**1**kilogram of meat costs**4**euros.**2**kilos of meat cost**8**euros.**3**kilos of meat cost**12**euros.- etc.

This calculation is based on a simple system. We can assign each value to another.

We can also represent this:

$\text{weight}\longmapsto\text{price}$

- $1 \longmapsto 4$
- $2 \longmapsto 8$
- $3 \longmapsto 12$
- ...

!

### Remember

A

**relationship**assigns a different value to each value. One uses for the representation an arrow: $\longmapsto$.## Presentation

There are various ways to represent relationships.

- Relationship table
- Graph of an relationship
- Relationship ratio (to calculate the values)

## Types

Typically, the school deals with two types of relationships as well as functions that also represent a relationship.