Lily likes to collect records. Last year she had 15 records in her collection. Now she has 24 records. What is the percent increase of her collection?
The percent increase of her collection is %.

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. david estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x.