GCSE Secondary Maths Age 13-17 - Graphs: Velocity-Time Graphs - Explained

The video tutorial explains how to estimate the distance traveled by a car using a speed-time graph. It covers the method of dividing the graph into four equal strips and calculating the area of each strip using trapeziums. The tutorial also discusses the accuracy of the estimation and explains why the calculated distance is an underestimate due to the graph's curve being above the trapeziums.

What are the heights of the lines that give the intervals for the strips in the graph?

In part B of the question, why is the answer considered an underestimate?

Describe the significance of the gradient of the tangent on a speed-time graph.