Given:
Given that the graph of the regression model.
We need to determine the type of the best - fitting regression model.
Model of the graph:
From the graph, it is obvious that the points in the graph does not follows a straight line and thus the graph is not a linear model.
Also, from the graph, we can see that the points in the graph follows a curve pattern.
This curve pattern in the graph indicates that the graph follows an exponential curve.
Therefore, the best - fitting regression model for the given data plot is exponential model.
Hence, Option C is the correct answer.