A departmental store had 190 kettles for sale during a 7-day period. The line graph shows the number of kettles left unsold at the end of each day. The number of kettles left unsold at the end of Day 7 was not shown.
- On which day was the greatest number of kettles sold? Give your answer in number. (Eg 1)
- The average number of kettles sold for the last two days was 19. How many kettles 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 3, the number of kettles sold was the greatest number.
(b)
Total number of kettles sold on the last two days
= 2 x 19
= 38
Total number of kettles sold on Day 6 = 10
Total number of kettles sold on Day 7
= 38 - 10
= 28
Answer(s): (a) 3; (b) 28