Something that's been blown out of proportion.

Something that’s been blown out of proportion.

Proportion is an easy topic, and nowhere near as frightening as it looks. Well, not normally any way. There are two (reasonably) simple formulas you must learn for proportion – one for direct proportion, and one for indirect proportion. But first, some definitions:

Directly Proportional – This is when ‘as one thing goes up, so does another’. For example, the amount of money you earn is proportional to the number of hours you work – the more hours you work, the more money you receive.

Inversely Proportional – This is when ‘as one thing goes up, another goes down’. For example. my laptop’s battery level is inversely proportional to the number of hours I spend using it. The higher the number of hours used, the lower the battery level.

More »

Trial and Error

So, what is trial and improvement?

Well, it’s definitely not trial and error… It’s trial and error’s mathematical cousin, trial and improvement. In all seriousness though, the exam boards are very picky with this kind of thing, and it’s “trial and improvement” – Think positive!

So? What is trial and improvement? Put simply, it’s mostly common sense… You’ll get given a question something like this:

Prove that x3 – 6x + 1 = 0 has a solution between two and three. correct to one decimal place.

More »