Find the general expression for the slope of a line tangent to the curve of y = x + 2x at the point P(x,y). Then find the slopes for x = -2 and x = 0.5. Sk the curve and the tangent lines. What is the general expression for the slope of a line tangent to the curve of the function y = x + 2x at the point P(x,y)? mtan The slope for x = -2 is The slope for x = 0.5 is Sketch the curve of y = x + 2x and the line tangent to it at x = -2. Choose the correct graph below. B. C. D. A. tangent to the curve of y = x + 2x at x=0.5. Choose the correct graph below.