The line graph shows the amount of money Tommy spent from July to December.

1. Of the amount Tommy spent in August, $161 was spent on transport and the remaining amount was spent on food. How much did he spend on food in August?
2. In which month did Tommy spend $220 more than the previous month? Give your answer in this format. (Eg Jan)

(a)
Amount that Tommy spent in August = $600

Amount that Tommy spent on food
= 600 - 161
= $439

(b)
To find an increase in a line graph, look for an increasing slope. 

The 3 increasing slopes are from July to August, August to September and November to December. Now, find the month when Tommy spent $220 more than the previous month.

Amount that Tommy spent in July = $360
Amount that Tommy spent in August = $600

Amount that Tommy spent in August more than July
= 600 - 360
= $240 (x)

Amount that Tommy spent in August = $600
Amount that Tommy spent in September = $820

Amount that Tommy spent in September more than August
= 820 - 600
= $220 (✓)

Amount that Tommy spent in November = $460
Amount that Tommy spent in December = $620

Amount that Tommy spent in December more than November
= 620 - 460
= $160 (x)

The month that Tommy spent $220 more than the previous month = Sep

Answer(s): (a) $439; (b) Sep