vocabulary
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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| constant of proportionality | the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
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| slope | to have or take an inclined or oblique direction or angle considered with reference to a vertical or horizontal plane; slant.
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| direct variation | mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other
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| x-intercept | the x-coordinate of a point where a line, curve, or surface intersects the x-axis
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| linear equation | a first-order equation involving two variables: its graph is a straight line in the Cartesian coordinate system.
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| is a point where the graph of a function or relation intersects with the y-axis of the coordinate system.
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| point-slop from | they give you a point (x1, y1) and a slope m, and have you plug it into this formula:
y – y1 = m(x – x1)
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| unit rate | describes how many units of the first type of quantity corresponds to one unit of the second type of quantity.
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| slop-intercpt from | goes straight up and down, its slope is undefined. Also, the x value of every point on a vertical line is the same
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| proportional relationship | are the comparison of two equal ratios. Therefore, proportional relationships are relationships between two equal ratios.
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| rate of change | The slope of a line is a rate of change.
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| intersecting lines | Two lines that cross each other. Lines intersect at one point unless the lines fall directly on top of each other
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