**Objectives:** In this tutorial, we investigate different ways to graphically and numerically find roots of functions and points of intersection of two
graphs of functions.
After working through these materials, the student with a graphing calculator should be able

- to find graphically and numerically an approximation to the coordinates of points of intersection of graphs of functions;
- to find graphically and numerically the roots of a function.

**Zooming in****Discussion**[Using Flash]**Example**.**LiveMath notebook**to graphically find the intersections of the graphs of two functions by zooming in.

**Using a graphing calculator**to find the root of an equation:- TI-86 Graphing Calculator [Using Flash]
- TI-85 Graphing Calculator

**Graphically using ISECT****Using a graphing calculator**to find the intersections of two equations:- TI-86 Graphing Calculator [Using Flash]
- TI-85 Graphing Calculator

**Numerical solution using SOLVER****Using a graphing calculator**to find the intersections of two equations:- TI-86 Graphing Calculator [Using Flash]

**Finding the roots of polynomials****Using a graphing calculator**to find the roots of polynomials:- TI-86 Graphing Calculator [Using Flash]