Determine the slope of the tangent to the function y = 1/(1-x) at the point (2, -1). How would you calculate this without using calculus?

A) Find the derivative of the function and substitute x = 2 into the derivative.
B) Use the slope formula with the coordinates of the point and the equation of the function.
C) Estimate the slope by drawing a tangent line on a graph of the function.
D) Use the limit definition of the derivative to find the slope.