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X-AXIS: In a graph, this is one of two lines that intersect at a right angle at their origins. This is the "horizontal-axis" that runs from right and left. In most analyses, the variable measured on the X-axis is consider to be the independent variable.

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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs trying to buy either a large green chalkboard shaped like the state of Maine or a replacement battery for your pocket calculator. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
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