This graph shows the cost of petrol. It shows that 20 litres will cost £23 or £15 will buy 13 litres. Gradient = \(\frac{\text{change up}}{\text{change right}}\) or \(\frac{\text{change in y}}{\ ...

A linear graph could be used when exchanging euros into pounds, two different types of currency. Linear graphs are commonly used when converting between different units of measurement. For example ...