Key learning points

1. Not all real-life graphs can be drawn using sections of different linear graphs.
2. The graphs are models, which means that we want them to be useful.

Common misconception

Keywords

• Simple interest - Interest is money added to savings or loans. Simple interest is always calculated on the original amount.

• Compound interest - Compound interest is calculated on the original amount and the interest accumulated over the previous period.

• Exponential - The general form for an exponential equation is $$y = ab^x$$ where $$a$$ is the coefficient, $$b$$ is the base and $$x$$ is the exponent.

• Speed - Speed is the rate at which something is moving. It is measured as the distance travelled per unit of time.

• Acceleration - Acceleration is the rate of change of speed with respect to time.