Use the tally chart (table) to draw a concrete graph. (Note: use square [ ] to represent colour.)

Using the given data, fill in the missing tally marks and numbers.

• Red: Tally HHH HH I represents $5 + 5 + 1 = 11$ pupils.
• Yellow: 8 pupils are represented by HHH III.
• Green: Tally HHH IIII represents $5 + 4 = 9$ pupils.
• Blue: 6 pupils are represented by HHH I.

The completed tally chart is:

Favourite Colour	Tally	Number of pupils
Red	HHH HH I	11
Yellow	HHH III	8
Green	HHH IIII	9
Blue	HHH I	6

The problem states to use a square ($\square$) to represent each pupil. We will draw the corresponding number of squares for each colour.

The concrete graph is:

• Red: $\square \square \square \square \square \square \square \square \square \square \square$
• Yellow: $\square \square \square \square \square \square \square \square$
• Green: $\square \square \square \square \square \square \square \square \square$
• Blue: $\square \square \square \square \square \square$

Here is the final answer for both parts:

Completed Tally Chart:

$$\boxed{ \begin{array}{|l|l|l|} \hline \text{Favourite Colour} & \text{Tally} & \text{Number of pupils} \\ \hline \text{Red} & \text{HHH HH I} & 11 \\ \text{Yellow} & \text{HHH III} & 8 \\ \text{Green} & \text{HHH IIII} & 9 \\ \text{Blue} & \text{HHH I} & 6 \\ \hline \end{array} }$$

Concrete Graph:

$$\boxed{ \begin{array}{l} \text{Red: } \square \square \square \square \square \square \square \square \square \square \square \\ \text{Yellow: } \square \square \square \square \square \square \square \square \\ \text{Green: } \square \square \square \square \square \square \square \square \square \\ \text{Blue: } \square \square \square \square \square \square \end{array} }$$