Alexei writes the power regression equation y is equal to 2 point 5 x raised to the 1 point 1 3 power to model the time, in minutes, it takes him to complete level x of a video game. Based on the regression equation, approximately how many minutes will it take him to complete level 4 of the video game?
Substitute x = 4 into the model: y = 2.5 × 4^1.13. Since 4^1.13 is approximately 4.79, the predicted time is about 2.5 × 4.79 = 11.98 minutes. That rounds to 12 minutes, so the correct choice is D, 12.
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