9 Word formulas and function machines
You see formulas in everyday life, but sometimes it can be tricky to spot one that’s written in words.
So what’s a formula? It’s a rule that helps you to work out an amount. You will see this when calculating speed, distance and time or working out how much you are going to get paid or your household bills.
A process that involves more than one formula needs a function machine, which we’ll look at a little later.