How To Draw Tangent Line - Adjust the angle of the straight edge so that near the point it is equidistant from the curve on either side of the point. Web use a tangent line to find the derivative from a graph. Put a straight edge at that point on the curve. Web to draw a tangent line: Choose a point on the curve. You don't know the tangent's equation yet, but you can already tell that its slope is negative, and that its y. Sketch the graph of the parabola. Web the tangent line of a curve y = f(x) is a line that touches the curve at a point (x 0, y 0).
Web to draw a tangent line: Web use a tangent line to find the derivative from a graph. Sketch the graph of the parabola. Adjust the angle of the straight edge so that near the point it is equidistant from the curve on either side of the point. Choose a point on the curve. You don't know the tangent's equation yet, but you can already tell that its slope is negative, and that its y. Put a straight edge at that point on the curve. Web the tangent line of a curve y = f(x) is a line that touches the curve at a point (x 0, y 0).