A500 point drop in the djia was a big drop when the djia was at 2,246 in october, 1987 and a much smaller drop when the djia reached 11,421 in september, 2008. the percent by which stock prices fall is a more meaningful measure. the lesson here is that . a. it is easy to make a mistake calculating a percent. b. the djia is a categorical variable. c. confidentiality has been violated. d. rates are often more meaningful than counts.

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x

step-by-step explanation:

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slope =   (y2 -y1) ÷ (x2 -x1)

slope = (0 -0) / (-5, -7)

slope = 0 / -12 = 0

the slope of the line is zero.   it is perfectly horizontal.

step-by-step explanation: