So our change in y over change in x is going to be three over five which is the slope of this line which is the derivative of the function at two because this is the tangent line at x equals two. We already know that it will be of the form y ax b and we know that a 2. To find this derivative we must use both the sum rule and the product rule.
Or when x5 the slope is 2x 10 and so on.
Enter A Numerical Value For The Slope. Using the sum rule we find. Finding the Formula of the Line. Solution for Let f x Vx.