Lori tosses a ball into the air. The equation y = –16(x – 1)2 + 25 models the height, y, in feet, of the ball after x seconds. What is the maximum height the ball reaches?

The equation is in vertex form, y = –16(x – 1)² + 25. Since (x – 1)² is always zero or positive, multiplying it by –16 gives a value that is zero or negative, so the greatest height occurs when x = 1 and the squared term is zero. The maximum height is 25 feet, choice D.

AI-written and checked against the verified answer.