The total change in the number of taxis is -200.
How to Find the total change in the number of taxis.
The number of taxis decreases by 50 each year for 4 years.
Year 1
-50
Year 2
-50
Year 3
-50
Year 4
-50
The total change in the number of taxis = -50 + -50 + -50 + -50 = -200
The total change in the number of taxis is -200 because the number of taxis decreases by 50 each year for 4 years.