Michael says that the difference between Dani's and Raj's ages is always the same, so Raj's age is proportional to Dani's,
2010
2015
2020 2025
Dani's Age
5
10
15
20
Raj's Age
10
15
20
25

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.