Rich example

## Situations

We want to investigate what different types of relationships occur in the situations given below. Each situation will relate to a set of things such as:

• All cars in the UK.

and a question asked such as:

• What colour is the car?

For each situation we want to consider the following questions:

• Is there always an answer?

• Could there be multiple answers for each person/place/number?

• Could different people/places/numbers have the same answer as each other?

 A map of the Himalayas. A place is at height $\quantity{x}{m}$ above sea level. Where is it on the map? People who were eligible to vote in the last General Election. Who did you vote for? People who voted in the last General Election. Who did you vote for? You and your friends Who do you and your friends follow on Twitter? All real numbers A number is rounded to the nearest whole number. What is it? People What does your right thumb print look like?

In this instance, we are not counting ‘no-one’ or ‘there isn’t one’ as answers.