Lesson 76 Quadratic Equation Worksheet - Mr. Jones
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7Lesson 76
Algebra
Name________________________
Mr. Jones
Date:_______________
S.W. B. A. T: Write a quadratic equation in vertex form for a parabolic graph.
DO NOW: Sketch the graph for the following function.
y = -2(x – 3)
2
+ 2
Step to write a quadratic equation when a parabolic graph is given.
1) Identify the vertex.
2) Replace h and k in the vertex form: y = a(x – h)
2
+ k
3) Identify another point on the graph.
4) Replace x and y with the value from 3.
5) Solve for a.
6) Write the entire equation using the vertex and the value of a.
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