midgeylalo midgeylalo 01-06-2023 Mathematics contestada 14 Here is a speed-time graph. Speed (m/s) 5 4 3 2 1 0 0 2 6 Time (7 seconds) (a) Work out an estimate of the gradient of the graph at = 3 (b) What does the area under the graph represent? 8 10 (3)