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Charla wants to determine the vertex of the function f(x) = x2 - 18x + 60 by changing the function into vertex form. Which
statement about the vertex of the function is true?
The x-coordinate of the vertex is greater than the y-coordinate.
The x-coordinate of the vertex is negative.
The y-coordinate of the vertex is greater than the y-intercept.
The y-coordinate of the vertex is positive.
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