Question: how to calculate the slope of a nonlinear line?
Answer: Find Slope Using Tangent Choose another point on the tangent and write its coordinates. Say, (6,7) is another point on the tangent line. Use the formula slope = (y2 - y1)/ (x2 - x1) to find the slope at point (2,3). In this example, the slope is given by (7 - 3) / (6 - 2) = 1.