In this deck, we'll explore three important rates of change: speed, density, and pressure. You'll learn the formulae that connect them to other quantities, and how to rearrange these formulae to solve different types of problems.

Let's start with speed. Speed measures how quickly an object covers a certain distance. It's a rate of change because it tells you the distance travelled for every unit of time, for example, miles per hour or metres per second.

A helpful way to remember the formula and its rearrangements is the formula triangle. Imagine a triangle split into three sections. Distance is in the top section. Speed and Time are in the two bottom sections. To find a quantity, you cover it with your finger and see the calculation that's left.