A departmental store had 200 juicers for sale during a 7-day period. The line graph shows the number of juicers left unsold at the end of each day. The number of juicers left unsold at the end of Day 7 was not shown.
- On which day was the greatest number of juicers sold? Give your answer in number. (Eg 1)
- The average number of juicers sold for the last three days was 11. How many juicers were sold on Day 7?
(a)
To find the greatest increase in the number of tickets sold, look for the steepest decreasing slope.
On Day 1, the number of juicers sold was the greatest number.
(b)
Total number of juicers sold on the last three days
= 3 x 11
= 33
Total number of juicers sold on Day 5 and Day 6
= 15 + 15
= 30
Total number of juicers sold on Day 7
= 33 - 30
= 3
Answer(s): (a) 1; (b) 3