A ball is kicked and after 2 seconds it reaches a maximum height of 21 m. At 3 seconds it reaches a height of 16 m. Determine the quadratic function that models the path of the ball. (2,21) (3,16) +21 (B) y=-5(x+2) +21 (C) y =---2y +21 (D) y=-5(x-2)' +21 O A If the parabola y= ax +bx+ c opens upward and has a vertex at (-2, 3), then it has: (A) two real roots (B) no real roots (C) one real root (D) three real roots O A

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