PSLEThe graph shows the amount of money Riordan saved from his pocket money every month from March to July.
- How much money did Riordan save altogether from March to July?
- What was the average amount of money Riordan saved from March to July?
- Riordan saved $21 in August. The amount saved increased by 100% from August to September and another 100% from September to October. How much money did Riordan save in October?
(a)
Amount saved in March = $36
Amount saved in April = 0
Amount saved in May = $100
Amount saved in June = $93
Amount saved in July = $91
Total amount saved from March to July
= 36 + 100 + 93 + 91
= $320
(b)
Average amount saved from March to July
= 320 ÷ 5
= $64
(c)
Amount that Riordan saved in August = $21
Amount that Riordan saved in September
= 21 + 21
= $42
Amount that Riordan saved in October
= 42 + 42
= $84
Answer(s): (a) $320; (b) $64; (c) $84