Pupils calculate the equation of a quadratic in vertex form from a specific graph and determine an equation that would fit the description of a parabola. The final question determines the individuals' understanding of the signs of the parameters given a general graph.

Concepts

graphing quadratics, quadratic functions, vertex form of an equation, vertex, graphing functions

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Additional Tags

math

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Instructional Ideas

• Use the task as a quick assessment after instruction on the vertex form
• Have individuals share out their thinking in arriving at a solution for part C

Classroom Considerations

• The class should be familiar with the terms concave up and concave down

Pros

• Explains several different solution approaches
• The graphs include several points learners can use to find the equations

Cons

• The key is numbered 1 - 3 while the task has questions A - C

Common Core

HSF-BF.B.3