The standard form of the equation of a parabola is y=1/2x^2 - 4x+21. What is the vertex form of the equation?
2 answers:
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The red graph is the result of a vertical translation, 4 units down, of the black graph.
This means that, whenever the black graph associates
The red graph must associate 4 less to the same input:
So, the equation for the red graph is
or, equivalently,