Mathematics for IGCSE & O level - Graphs Of Functions (Section 6 - No. 2)
What is the key to estimating the gradient of a curve at a point?
Finding the y-intercept
Drawing a tangent at that point
Calculating the area under the curve
Finding the points where the curve crosses the x-axis
Explicació
The gradient of a curve at a given point can be estimated by drawing a tangent to the curve at that point.