Class Find lim h0 f(x+h)- f(x) h Day #12 Homework for each of the functions below. Then, find the equation of the tangent line to the graph of f(x) at the given value of x. 1. f(x) = x+2x 3. f(x)=3-x 2. Find the equation of the line tangent to the graph 4. Find the equation of the line tangent to the graph of f(x)=x+ = x + 2x at x = -1. of f(x)=3-x at x=-6.