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

1. Of the amount David spent in August, $125 was spent on clothes and the remaining amount was spent on food. How much did he spend on food in August?
2. In which month did David spend $160 more than the previous month? Give your answer in this format. (Eg Jan)

(a)
Amount that David spent in August = $340

Amount that David spent on food
= 340 - 125
= $215

(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 David spent $160 more than the previous month.

Amount that David spent in July = $160
Amount that David spent in August = $340

Amount that David spent in August more than July
= 340 - 160
= $180 (x)

Amount that David spent in August = $340
Amount that David spent in September = $500

Amount that David spent in September more than August
= 500 - 340
= $160 (✓)

Amount that David spent in November = $100
Amount that David spent in December = $220

Amount that David spent in December more than November
= 220 - 100
= $120 (x)

The month that David spent $160 more than the previous month = Sep

Answer(s): (a) $215; (b) Sep