The line graph shows the total number of used vacuum cleaners sold by a dealer in the first six months of the year.
- In which two months were there a consecutive increase in the number of vacuum cleaners sold? Give the answer in short form. (Eg Jan, Feb)
- What fraction of the vacuum cleaners was sold in the month of the lowest sale?
- The dealer was paid a fixed amount of money for every vacuum cleaner he sold. He received $2200 more in April than in February. How much money did he receive from selling a vacuum cleaner?
(a)
There was a consecutive increase in the number of vacuum cleaners sold in March and April.
(b)
Total number of vacuum cleaners
= 18 + 12 + 18 + 21 + 13 + 18
= 100
Number of vacuum cleaners sold in February = 12
Fraction of the vacuum cleaners sold in the month of the lowest sale
=
12100 =
325 (c)
Number of more vacuum cleaners sold in April than in February
= 21 - 12
= 9
9 u = 2200
1 u = 2200 ÷ 9 = 800
Amount earned from selling a vacuum cleaner = $800
Answer(s): (a) Mar, Apr or Apr, Mar; (b)
325; (c) $800