Find the Slope of the Tangent Line of the Graph $$f ( x ) = \frac { x ^ { 2 } } { 2 } + 1$$

question 55

Essay

Find the slope of the tangent line of the graph of $$f ( x ) = \frac { x ^ { 2 } } { 2 } + 1$$ at the point $( 4,9 )$ .