Suppose we have two functions, {{MATH_125}}, and {{MATH_126}}, and we know that {{MATH_127}} and {{MATH_128}}. What is the slope of the tangent line to the graph {{MATH_129}} at {{MATH_130}}? {{CMD_131}} The slope of the tangent line to the graph of the function {{MATH_132}} at {{MATH_133}} is the derivative {{MATH_134}}. By the Sum Rule, this derivative is given by {{MATH_135}}. In this case, we have {{MATH_136}}. {{CMD_137}} {{CMD_138}}