# Math Insight

### Overview of: Approximating a nonlinear function by a linear function

The slope of a secant is the average rate of change of a function over an interval. As the interval shrinks, the secant line approaches the tangent line. The slope of the tangent line is the instantaneous rate of change of a function at a particular point.

#### Points and due date summary

Total points: 3
Assigned: Sept. 28, 2018, 2:30 p.m.
Due: Oct. 5, 2018, 11:59 p.m.