**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 solve quadratic equations by graphing and inspecting the \(x\)-intercepts (roots).