The scatterplot shows data on the usage of a computer ' s CPU over time. The graphed regression function has an r^2value of 0.25. What is the appropriate range of x-values for extrapolation?
Correct Answer: C
The value r^2measures how well a regression model fits the data. Here: r^2=0.25 This is a low r^2value, meaning the model explains only about: 25% of the variation in the data. That indicates a weak fit. When a model has a weak fit, using it for extrapolation is not reliable because predictions outside the data range may be very inaccurate. Since: 0.25 < 0.3 the best conclusion is that extrapolation is not appropriate because the regression model does not fit the data well enough. Therefore, the correct answer is: # ( " C " )