Answer:
A = ₤500
B = ₤420
C = ₤340
D = ₤260
See Image 1 attached for the plot.
Explanation:
The bank account starts with ₤500, so that is the amount at 0 months on the chart.
After one month, ₤80 is withdrawn, and the total becomes:
![500-80=420](https://img.qammunity.org/2023/formulas/mathematics/high-school/wt8yom7tdjxnprelrd8wk3pyp2lf1opd31.png)
After two months, another ₤80 is withdrawn from the account:
![420-80=340](https://img.qammunity.org/2023/formulas/mathematics/high-school/ewzdh4z56rqbz6zlugkyl2jmwnrs9tuk5e.png)
Finally, after 3 months, ₤80 is withdrawn again:
![340-80=260](https://img.qammunity.org/2023/formulas/mathematics/high-school/nhb72m8ggooeo8esvb6mernrfg1148rvvv.png)