microbook_3e-page7

microbook_3e-page7 - equation: y = 5x + 20 y = 4x + 5 y =...

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equation: slope: y-int: y = 5x + 20 52 0 y = 4x + 5 4 5 y = 2x + 15 2 15 What is SLOPE? x the change in y divided by the change in x o y = –5x + 20 o x increases from 1 to 2 o y decreases from 15 to 10 o slope: 5 1 5 1 2 15 10 0 0 0 0 x positive slope: x and y increase and decrease together x negative slope: x and y increase and decrease inversely (when one rises the other falls) Math – tool of econ. analysis NB: in linear functions (such as the ones here) the slope equals the value of the parameter by the variable X. x Why does curve slope up? x When is avg. consumption greater than avg. income?
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This note was uploaded on 12/29/2011 for the course ECO 311 taught by Professor Willis during the Fall '10 term at SUNY Stony Brook.

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