Concept explainers
To find the best function that models the data and write its equation.
Answer to Problem 19PPE
The exponential function
Explanation of Solution
Given information:
The average monthly balance of a savings account is shown below:
Graph the data:
The graph seems to be linear or exponential.
Test for common ratio:
The y-values have a common ratio of
Write an exponential model:
The exponential model is given by
The graph passes through
Thus,
The graph also passes through
Therefore,
Hence, the exponential model is given by
Chapter 9 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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