Consider the following function. f(x)=√√√x, (4,2) (a) Find an equation of the tangent line to the graph of f at the given point. y = (b) Use a graphing utility to graph the function and its tangent line at the point. Use the tangent feature of a graphing utility to confirm your results. (Select the correct graph.) y 4 3 2 4 6 8 10 4 3 2 1 2 4 6 8 10 2 4 6 8 10

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