A departmental store had 190 toaster ovens for sale during a 7-day period. The line graph shows the number of toaster ovens left unsold at the end of each day. The number of toaster ovens left unsold at the end of Day 7 was not shown.
- On which day was the greatest number of toaster ovens sold? Give your answer in number. (Eg 1)
- The average number of toaster ovens sold for the last three days was 10. How many toaster ovens 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 4, the number of toaster ovens sold was the greatest number.
(b)
Total number of toaster ovens sold for the last three days
= 3 x 10
= 30
Total number of toaster ovens sold on Day 5 and Day 6
= 5 + 5
= 10
Total number of toaster ovens sold on Day 7
= 30 - 10
= 20
Answer(s): (a) 4; (b) 20