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Shows the relationship between two changing quantities. |
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The rate of vertical change (rise) to the horizontal change (run) |
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A relationship that can be represented by a function in the form y=kx, where k does not equal zero. |
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k is the coefficient of x |
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constant of variation for a direct variation |
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The simplest function with the characteristics of a family of functions. |
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An equation that models a linear function. |
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The y coordinate of a point where the graph crosses the y-axis |
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An equation of a nonvertical line with slope m and through point (x1,y1) is y-y1=m(x-x1). |
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Ax + By = C, where A, B, and C are real numbers, and A and B are not both zero. |
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standard form of a linear equation |
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The x-coordinate of a point where a graph crosses the the x-axis. |
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Lines in the same plane that never intersect. |
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Lines that intersect ro form right angles. |
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Two numbers whose product is -1. |
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A graph that relates two different sets of data by displaying them as ordered pairs. |
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When y tends to increase as x increases, in two sets of data. |
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When y tends to decrease as x increases, in two sets of data |
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When x and y are not related, in two sets of data |
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A line on a scatter plot, drawn near the points, that shows a correlation. |
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Estimating a value between two known values. |
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Predicting a value outside the range of known values. |
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The trend line that shows the relationship between two sets of data most accurately |
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When a change in on quantity causes a change in a second quantity. |
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Has a V-shaped graph that opens either up or down. |
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A shift of a graph horizontally, vertically, or both. |
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A function that has different rules for different parts of its domain. |
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A function that pairs every number in an interval with a single value. |
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