Real-life and kinematic graphs (distance–time, speed–time)

A point was read as $(1, 4)$ because it was "1 square along, 4 squares up" — but each square was not one unit, so the true values differed. Always use the axis scale.

$9$ h $36$ min is $9.6$ h (since $36 \div 60 = 0.6$), not $9.36$. Convert minutes to a fraction of an hour first.

Writing $\text{distance} = \text{speed} \div \text{time}$ instead of $\times$, or dividing the wrong way round.

On a speed–time graph the accelerating part is a triangle: distance $= \tfrac{1}{2} \times$ base $\times$ height. Using speed × time (the rectangle rule) for it doubles that distance.

On a speed–time graph the gradient is the acceleration and the area is the distance. Reading the area when acceleration is wanted (or the reverse) is a frequent mix-up.