This unit is split up into three section, first this introduction, and then two more sections. After reviewing this unit, you will be able to:

- Identify the Point of Tangency on a curve.
- Determine whether a line is a tangent line.
- Calculate the slope at a point on a curve.
- Determine whether the slope at a point on a curve is positive, negative, zero, or infinity.
- Identify maximum and minimum points on a curve
- Determine whether a curve does or does not have maximum and minimum points.

Most relationships in economics are, unfortunately, not linear.
Each unit change in the *x* variable will not always bring
about the same change in the *y* variable. The graph of this
relationship will be a curve instead of a straight line.

This graph below shows a linear relationship
between x and y. |
This graph below shows a nonlinear relationship
between x and y. |

In the remainder of this unit you will learn how to determine the slope of a nonlinear relationship and about maximum and minimum points on a curve. To continue on, press the next section button below.

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