Explore the relationship between the center and radius of a circle and the equation of the circle. Collect data and determine regression equations related to various combinations of data, and use the regression equations to make predictions.

Students should have access to either TI-83 Plus or TI-84 Plus.

Provide each student with a printed copy of the attached document.

Review student results and, as a class, dicuss questions that appeared to be more challenging. Re-teach concepts as necessary.