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 a patient’s Body Mass Index (BMI), 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.