Quadratic Functions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Quadratic function | A function in the form y=ax2+bx+c (or f(x)=ax2+bx+c). They form a parabola when graphed and have second differences that are the same.
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| parabola | The graph of a quadratic function. They look like a “u” that keeps going outwards.
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| Vertex | The bottom or top point of the parabola.
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| Minimum | The lowest point of a function or graph.
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| Maximum | The highest point of a function or graph.
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| Symmetry | Being the same on both sides of a line. Each sides is a reflection of the other across a line.
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| Axis (or line) of symmetry | The line running through the vertex. All of the other points have matching points on each side. One side of the parabola is a reflection across this line of the other line.
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| Symmetric pairs | Each pair of points that are the same distance across the line of symmetry.
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| First differences | If the changes in x are constant, the first differences are the changes in y. For linear equations they would be constant.
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| Second differences | If the changes in x are constant, the second differences are the differences in the first differences. For quadratic functions they would be constant.
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| Best fit curve | The function that best fits a set of collected data.
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Created by:
meminot
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