The line tangent to the graph of the twice-differentiable function f at the point = 3 is used to approximate the value of f(3.25). Which of the following statements guarantees that the tangent line approximation at a = 3.25 is an underestimate of f(3.25) ? A B (0) The function f is decreasing on the interval 3 ≤ ≤3.25. The function f is increasing on the interval 3 < x <3.25. The graph of the function f is concave down on the interval 3 < a <3.25. The graph of the function f is concave up on the interval 3 ≤ x ≤3.25.

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