equation: slope: y-int: y = –5x + 20 –520y = 4x + 5 4 5 y = –2x + 15 –2 15 What is SLOPE? xthe change in y divided by the change in x oy = –5x + 20 ox increases from 1 to 2 oy decreases from 15 to 10 oslope:5151215100000xpositive slope:x and y increase and decrease together xnegative 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.xWhy does curve slope up? xWhen is avg. consumption greater than avg. income?
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