• Sep 16, 2025 Dy Dx f the tangent line to the parabola y = x² at any point x is twice the x-coordinate. At x = 2, the slope is 4; at x = -1, the slope is -2. 3. Beyond the Slope: Rates of Change The power of dy/dx extends beyond simple geometry. It represents the instantaneous rate of change of one variable with re By Hilda Friesen
