The height y , in feet, of a football x seconds after it is thrown is modeled by the equation y is equal to negative 16 x squared plus 24 x plus 1 What information does the zero of the equation 6 is equal to negative 16 x squared plus 24 x plus 1 represent?
Answer
A
the height of the ball after 6 seconds
B
the initial upward velocity of the ball
C
the horizontal distance traveled by the ball when it is 6 ft above the ground
D
when the ball is 6 ft above the ground
Explanation
The equation sets the ball’s height equal to 6 feet: 6 = −16x² + 24x + 1. Its solutions are the times, in seconds, when the ball is 6 feet above the ground. Therefore, the equation’s zero represents when the ball is 6 feet above the ground, not its height after 6 seconds.
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