The line graph shows the number of tourist attraction tickets sold from Monday to Friday.

1. What is the difference between the highest and the lowest number of tourist attraction tickets sold from Monday to Friday?
2. Between which 2 days did the number of tickets sold decrease the greatest? Give your answer in the following format.  (Eg Mon to Tue)

(a)
Highest number of tourist attraction tickets sold = 4200 (Tuesday)
Lowest number of tourist attraction tickets sold = 1800 (Friday)

Difference between the highest and the lowest number of tourist attraction tickets sold from from Monday to Friday
= 4200 - 1800
= 2400

(b)
To find the greatest decrease in the number of tickets sold, look for the steepest decreasing slope.

Between Thursday to Friday, the number of tickets sold decreased the greatest.

To show: 

Increase in the number of tourist attraction tickets sold from Monday to Tuesday
= 4200 - 2800
= 1400

Decrease in the number of tourist attraction tickets sold from Tuesday to Wednesday
= 4200 - 2800
= 1400

Increase in the number of tourist attraction tickets sold from Wednesday to Thursday
= 3300 - 2800
= 500

Decrease in the number of tourist attraction tickets sold from Thursday to Friday
= 3300 - 1800
= 1500

Answer(s): (a) 2400; (b) Thu to Fri