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Exploring Quadratic Graphs - Problem 6

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If we have a table of values as our only information about a quadratic function, we can still determine many key features. As always, the y intercept is the point where the x-value is zero. The x-intercepts (there could be zero, one, or two) are the point(s) where the y-value is zero. If you imagine a parabola graph, you know that the vertex represents either the highest y-value or the lowest y-value, depending on whether the parabola opens up or down. Look for a change in the y values from increasing to decreasing (or visa-versa) to locate the vertex.

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