Review the table of values showing the mass of a radioactive isotope over time. Time (Seconds)

Mass Remaining (Milligrams)

2

13

4

8

5

6.5

10

2

12

1.2

Which statement best describes the explanatory and response variables in the regression model?

In the logarithmic regression model, the explanatory variable is time and the response variable is the remaining mass.
In the logarithmic regression model, the explanatory variable is the remaining mass and the response variable is time.
In the exponential regression model, the explanatory variable is time and the response variable is the remaining mass.
In the exponential regression model, the explanatory variable is the remaining mass and the response variable is time.