Ambrose drives at 50 km/h for 2 hours, rests for 1 hour, and then drives another 70 km in 1.5 hours. Draw a distance-time graph to illustrate the journey.

• Speed = $50 \text{ kmh}^{-1}$
• Time = 2 hours
• Distance = Speed $\times$ Time = $50 \text{ kmh}^{-1} \times 2 \text{ h} = 100 \text{ km}$ At the end of this segment: Time = 2 hours, Distance = 100 km. Point 1: $(0, 0)$ Point 2: $(2, 100)$

• Time = 1 hour
• Distance covered = 0 km (during rest, distance remains constant) At the end of this segment: Total Time = $2 \text{ h} + 1 \text{ h} = 3 \text{ h}$, Total Distance = 100 km. Point 3: $(3, 100)$

• Distance = $70 \text{ km}$
• Time = $1\frac{1}{2} \text{ h} = 1.5 \text{ h}$ At the end of this segment: Total Time = $3 \text{ h} + 1.5 \text{ h} = 4.5 \text{ h}$, Total Distance = $100 \text{ km} + 70 \text{ km} = 170 \text{ km}$. Point 4: $(4.5, 170)$

The graph will have "Time (hours)" on the x-axis and "Distance (km)" on the y-axis.

• From $(0, 0)$ to $(2, 100)$: A straight line with a positive slope, representing constant speed.
• From $(2, 100)$ to $(3, 100)$: A horizontal line, representing no change in distance (rest period).
• From $(3, 100)$ to $(4.5, 170)$: A straight line with a positive slope, representing constant speed.

The key points for the graph are:

• Start: $(0 \text{ h}, 0 \text{ km})$
• After 2 hours: $(2 \text{ h}, 100 \text{ km})$
• After 3 hours (including 1 hour rest): $(3 \text{ h}, 100 \text{ km})$
• After 4.5 hours (total journey): $(4.5 \text{ h}, 170 \text{ km})$

ITEM 5
In a survey carried out in a vehicle park, it was found that 40% were saloon cars, 25% buses, 20% lorries and 15% motorcycles. Represent this information on a pie-chart.

To represent this information on a pie chart, we need to calculate the angle for each category. A full circle is $360^\circ$.

The angles are correct. To draw the pie chart, you would divide a circle into sectors with these calculated angles.