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:

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

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

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.

• Proportional relationships
• Inversely proportional relationships
• Functions