**21.0:** Students graph quadratic functions and know that their roots are the \(x\)-intercepts.

**22.0:** Students use the quadratic formula or factoring techniques or both to determine whether the graph of a quadratic function will intersect the \(x\)-axis in zero, one, or two points.

**23.0:** Students apply quadratic equations to physical problems, such as the motion of an object under the force of gravity.

## Today's Objective

Students will be able to use the discriminant to determine the number of \(x\)-intercepts for the graph of a quadratic equation.