Higher - The gradients of two perpendicular lines will always multiply to make –1. Make sure you are familiar with finding the equation of a line and calculating gradient to understand equations of ...

Use this comprehensive equation of a line worksheet as a revision resource. Alternatively, select the parts appropriate to what you are teaching. While you’ll typically introduce the material in this ...

Next time you're stuck in line, take a second to observe. Is it straight? Does it curve? How long would it have to be before you'd give up? Turns out there's a whole army of scientists dedicated to ...