Algebra 1: 10.2- Graphing Quadratics

Learning Task/Big Idea: Students will learn how to graph quadratic equations by binding

the vertex and whether the parabola opens up or down.

Notes:

Step 1: First decide if the graph opens UP or DOWN:

*If the term is ________________ the parabola opens _____________.

    *If the term is _______________ them parabola

opens ____________. 

Ex.1: Determine if the parabola will open UP or DOWN:

A) B)

C) D)

342 2 xxy 45 2 xy

122 xxy 2xy

Step 2: Second find the coordinates of the ___________. Then you can graph the quadratic using the vertex and which way the parabola opens.*Pick out a, b from the quadratic equation: *To find the x-value of the vertex we use the formula______________.*To find the y-value of the vertex you plug the x-value into the equation.

Ex. 2: Use step 1 and step 2 to graph the quadratic equation. (Decide which way the parabola should open

and find the coordinates of the vertex, then graph) A) 122 xxy

B) 962 2 xxy

C) 42 xy