The height of a baseball hit from a bat is modeled by a quadratic function of time, h of t What does the second coordinate of the vertex of the quadratic function represent?

The vertex of a quadratic graph gives its turning point. For height h as a function of time t, the vertex’s second coordinate is the height at that point. Since a baseball’s height follows a downward-opening parabola, that height is the maximum height, so the correct choice is “the maximum height of the baseball.”

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