Find the equation of the tangent line to the graph of the given function at the point with the indicated x-coordinate. f(x) = x; x = -2 X y = Sketch the curve together with the appropriate tangent line. 20 y -10 10 -5 -10 -20 20 10 y 20 10- y 20 10 X X X X 5 10 -10 -5 5 10 -10 -5 5 10 -10 -5 5 10 10 -10 10 10 -20 -20 -20