Can someone help me I really don't get this one
The table shows the number of trolley buses in operation in the United States during certain years.
Describe the rates of change in the number of buses during the time period.
(Table)
Year 1980 1985 1990 1995 2000
Number 823 676 832 885 951
of Buses
The changes from one period to the next are
-147 156 53 66
Since each period is 5 years long, the average yearly change during each period is roughly
-30 31 10 12
Not sure what else they're after.
To describe the rates of change in the number of trolley buses during the specified time period, we can calculate the differences between the number of buses in consecutive years and analyze the trends.
To find the rate of change between two years, you can subtract the number of buses in the earlier year from the number of buses in the later year. Then, divide the result by the number of years between the two years.
Let's calculate the rates of change for each interval:
- From 1980 to 1985: (676 - 823) / (1985 - 1980) = -29.4 buses per year. The number of trolley buses decreased by an average of 29.4 per year during this interval.
- From 1985 to 1990: (832 - 676) / (1990 - 1985) = 31.2 buses per year. The number of trolley buses increased by an average of 31.2 per year during this interval.
- From 1990 to 1995: (885 - 832) / (1995 - 1990) = 10.6 buses per year. The number of trolley buses increased by an average of 10.6 per year during this interval.
- From 1995 to 2000: (951 - 885) / (2000 - 1995) = 13.2 buses per year. The number of trolley buses increased by an average of 13.2 per year during this interval.
By analyzing the rates of change, we can observe that the number of trolley buses decreased between 1980 and 1985, but then increased in subsequent intervals. This implies that there was a decline in trolley buses initially, followed by a subsequent recovery and growth.