Distance-time graphs ... find the average of the speeds for sections A, B and C. The gradient in section E is -8. The speed is 8 miles per hour because speed is always a positive value. The ...

\(gradient = \frac{change~in~y}{change~in~x} = \frac{change~in~distance}{change~in~time} = \frac{change~in~metres}{change~in~seconds} = m/s.\) The gradient of a ...