12.2.4 Data Handling, PT3 Focus Practice

$\begin{array}{l}\frac{20}{100}\times C=14\\ C=14\times \frac{100}{20}\\ =70\\ m=70-\left(8+14+17+11\right)\\ =70-50\\ =20\end{array}$

Question 8:
Diagram below shows an incomplete line graph of the number of eggs sold in four weeks. The number of eggs sold on week 1 is 2000 and 4000 on week 4.

(a) Complete the line graph in the Diagram.
(b) Complete the pie chart in the second Diagram to represent sales from Week 1 to Week 4.



Solution:
(a)


(b)
$\begin{array}{l}\text{First week}\\ =\frac{2000}{2000+1500+2500+4000}\times {360}^o\\ =\frac{2000}{10000}\times {360}^o\\ ={72}^o\\ \\ \text{Fourth week}\\ =\frac{4000}{10000}\times {360}^o\\ ={144}^o\end{array}$