By visual inspection, determine the best-fitting regression
model for the data plot below.

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.