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Let f(x) 25 25 The slope of the tangent line to the graph of f(x) at the point - 6, 15 The equation of the tangent line to the graph of f(x) at (- 6. - is y = ma + bfor and b Hint: the slope is given by the derivative at r = - 6, ie. f( - 6 + h) - f(-6) lim h-+0 h