What practical examples are there of uses of the real number line in everyday life?

3 Answers
Dec 22, 2016

Mechanical devices for measuring.


Most mechanical devices for measuring contain part of the real number line.

Some examples:

  • (Marked) ruler

  • Protractor

  • Kitchen/bathroom scales

  • Micrometer (twice)

  • Pressure gauge

  • Barometer

Dec 22, 2016

One you probably already use. The axis of a graph.

Dec 22, 2016

The most obvious one we use daily is a thermometer - the temperature can increase from freezing point, but it is possible to have negative temperatures as well.

You can read your altitude on the screen of a GPS unit - it will tell you how high or even how far below sea level you are.