Question

The number of visits to public libraries increased from 1.3 billion in 1993 to 1.7 billion in 1997. Find the average rate of change in the number of public library visits from 1993 to 1997.

Answer 1

The average rate of change in the number of public library visits from 1993 to 1997 was of 0.1 billion an year.

Explanation:

Average rate of change:

Division of the subtraction of the final value by the initial value, divided by the length of time.

The number of visits to public libraries increased from 1.3 billion in 1993 to 1.7 billion in 1997.

Initial value: 1.3 billion

Final value: 1.7 billion

1997 - 1993 = 4 years.

Thus:

`A = (1.7 - 1.3)/(4) = (0.4)/(4) = 0.1`

The average rate of change in the number of public library visits from 1993 to 1997 was of 0.1 billion an year.