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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 | a number that measures its "steepness", usually denoted by the letter m. It is the change in y for a unit change in x along the line.
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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 | an equation between two variables that gives a straight line when plotted on a graph.
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| Y-Intercept | the y-coordinate of a point where a line, curve, or surface intersects the y-axis
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| Point-Slope form | the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1, y1) are the coordinates of a given point on the line
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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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| Slope-intercept form | the equation of a straight line in the form y = mx + b where m is the slope of the line and b is its y-intercept
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| Proportional relationship | a relationship between inputs to outputs in which the ratio of inputs and outputs is always the same.
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| Rate of change | a value that results from dividing the change in a function of a variable by the change in the variable.
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| Intersecting lines | lines that cross at the same point.
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