What is the slope between the points (2, 4) and (5, 9)?
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What is the derivative of f(x) = 5x^3 - 2x^2 + 4x - 7 with respect to x?
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Math question: The linear function f(x) = x represents a straight line on a graph. It has a slope of 1 and passes through the point (0, 0). Find the value of f(5).