define for all x. Find the equation of the tangent line to the graph of at the point (2,13).

I know that for a function (I is a neighborhood of the point ) that is differentiable at , the tangent to the graph of the point is given by the equation:

To find the slope of the line, wehave

is the slope of this function is 2 then? I cannot figure out if this is correct and how to find the equation of the tangent line