EUS 4: Rate of Change
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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direct variation | when two variables are related in such a way that the ratio of their values always remain the same
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negative slope | if the line goes down and to the right on a graph
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no/zero slope | (y = #) is a horizontal line because there is no change in the y value
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rate of change | tells how fast one variable changes compared with the other
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slope (positive or negative) | A measure of steepness of a straight line; graphically positive goes up and to the right; graphically negative goes down and to the right
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undefined slope | (x = #) is vertical line because there is 0 change in the x value
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y-intercept | where the line or parabola crosses the y-axis
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Δx | indicates change in the domain
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Δy | indicates change in the vertical axis
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