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.