Speed of walking or driving would be measured in kilometres per hour.
Supermarkets price tags for groceries give unit rates so that customers can compare the price of similar goods fro different manufacturers, or in different sized packages.
The labour cost of calling out a workman = fixed [call out] cost plus an hourly rate.
in the real world
Roads are an example of intersecting lines in the real world.
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
An example of a real world rate is 45630.19106 debt per capita (person).
Value of X can be chosen randomly when making a table of values representing a real world situation.
Scales or balances.
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The Grand Canyon.
A Jarlid
McDonalds Arches
Balls