Quadratics, Day 3

Our third lesson with quadratics is our final version of graphing quadratics. Today we discussed the vertex form of the quadratic function: y = a (x - h) ² + k. This form makes is the easiest for identifying the vertex of the parabola.

• The vertex is located at (h, k). Students need to remember that they switch the sign of what the "see" inside the parenthesis in the equation for h. The value of k is exactly what they "see" to the right of the parenthesis in the equation.
• Use a table to select values near the vertex. Substitute these values in for x and solve for y. Get at least 5 points on the graph.
• Plot these points and draw a U-shaped curve.

Homework: Worksheet on Graphing Quadratics in Vertex Form

Don't forget to do your vocabulary and your online EOCT practice test. Both are due tomorrow!!!

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