Khan Academy
Khan Academy: Algebra: Applying Quadratic Functions 2
Video solving an application problem by finding a quadratic equation to represent the distance of a diver above the water based on his time in the air by determining his average velocity. Equation is solved using the quadratic formula....
Khan Academy
Khan Academy: Algebra: Quadratic Functions 3
Video graphing a parabola by plotting the roots, vertex and axis of symmetry. Roots of the quadratic function are found by factoring. Vertex of the parabola is found by three different methods: taking the midpoint of the roots, finding...
Khan Academy
Khan Academy: Solving and Graphing Quadratics: Roots and Vertex of a Parabola
Video graphing a parabola by plotting the roots, vertex and axis of symmetry.