Ratio, proportion and rates of change
Topics
Ratio
Ratio notation, dividing in a ratio, combining ratios, maps and similar shapes.
Proportion
Direct and inverse proportion, best buys, and the graphs and equations of both.
Percentage change
Multipliers, comparing change, reverse percentages, and repeated interest.
Compound measures
Speed, density and pressure, rates of pay and flow, and gradients as rates.
Growth and decay
Compound interest, depreciation, exponential change, and the models behind them.