Think about coconuts sold at the market. Because they come in different sizes, they have various prices. Since the selling price of a coconut does not take a fixed value, we say the price is a variable.
Variables are changing values! We often use English letters like x, y, z (which are algebraic symbols) to represent them.
Examples of Variables:
If something always stays exactly the same, it is called a Constant Value.
Time for Exercise 18.2!
Decide whether each of the following is a Constant Value or a Variable. Click on an answer to see if you are right immediately!