Problem 55 of 7
Build a quadratic function with vertex (0,5) passing through point (1,2).
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use vertex form and solve for scale factor.
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Vertex and point must determine a nonzero scale factor.
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Solution
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1. Start with f(x)=a(x-h)^2+k using the vertex.
2. Substitute the given point for x and f(x).
3. Solve for a and write the function.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Functions that use the point as the vertex.