A departmental store had 160 food processors for sale during a 7-day period. The line graph shows the number of food processors left unsold at the end of each day. The number of food processors left unsold at the end of Day 7 was not shown.
- On which day was the greatest number of food processors sold? Give your answer in number. (Eg 1)
- The average number of food processors sold for the last three days was 7. How many food processors 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 food processors sold was the greatest number.
(b)
Total number of food processors sold for the last three days
= 3 x 7
= 21
Total number of food processors sold on Day 5 and Day 6
= 5 + 10
= 15
Total number of food processors sold on Day 7
= 21 - 15
= 6
Answer(s): (a) 4; (b) 6