Question: how to find the slope of a tangent line in excel?
Answer: Using the previous example, enter "=SLOPE(B2:B4,A2:A4)" in an empty cell, which results in a slope of 0.5. The equation for the tangent line is "y - Y = dy/dx * (X) * (x - X)." The point (X,Y) is where you're calculating the tangent line.