A science class conducts an experiment using a falling object. The class determines that a quadratic regression equation y is equal to negative 15 point 9 x squared plus 99 point 2 will model the height, in feet, of the object after x seconds. Based on this model, what is the approximate height of the object after 1 point 5 seconds?
Substitute x = 1.5 into the model: y = −15.9(1.5)² + 99.2. Since (1.5)² = 2.25, y = −35.775 + 99.2 = 63.425, which rounds to about 63.4 feet. The correct choice is 63.4 feet.
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