Question

A daily newspaper has 12135 subscribers when it began publication. Five years later it had 10090 subscribers. What is the average yearly rate of change in the number of subscribers for the five-year period?

Answer 1

-409

Explanation:

At the beginning - 12,135 subsribers,

Initial number of subsribers = 12,135

At the end - 10,090 subsribers

Final number of subsribers = 10,090

Time = 5 years.

So, the average yearly rate of change is

`\frac{\text{Final number of subsribers}-\text{Initial number of subsribers}}{\text{Time}}\\ \\=(10,090-12,135)/(5)\\ \\=(-2,045)/(5)\\ \\=-409`

The number of subscribers decreases by 409 per year