The line graph shows the amount of money David spent from January to June.

1. Of the amount David spent in February, $200 was spent on clothes and the remaining amount was spent on food. How much did he spend on food in February?
2. In which month did David spend $100 more than the previous month? Give your answer in this format. (Eg Jan)

(a)
Amount that David spent in February = $360

Amount that David spent on food
= 360 - 200
= $160

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

The 3 increasing slopes are from January to February, February to March and May to June. Now, find the month when David spent $100 more than the previous month.

Amount that David spent in January = $180
Amount that David spent in February = $360

Amount that David spent in February more than January
= 360 - 180
= $180 (x)

Amount that David spent in February = $360
Amount that David spent in March = $460

Amount that David spent in March more than February
= 460 - 360
= $100 (✓)

Amount that David spent in May = $100
Amount that David spent in June = $380

Amount that David spent in June more than May
= 380 - 100
= $280 (x)

The month that David spent $100 more than the previous month = Mar

Answer(s): (a) $160; (b) Mar