A departmental store had 190 gas stoves for sale during a 7-day period. The line graph shows the number of gas stoves left unsold at the end of each day. The number of gas stoves left unsold at the end of Day 7 was not shown.
- On which day was the greatest number of gas stoves sold? Give your answer in number. (Eg 1)
- The average number of gas stoves sold for the last two days was 13. How many gas stoves 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 gas stoves sold was the greatest number.
(b)
Total number of gas stoves sold on the last two days
= 2 x 13
= 26
Total number of gas stoves sold on Day 6 = 5
Total number of gas stoves sold on Day 7
= 26 - 5
= 21
Answer(s): (a) 3; (b) 21