13. what does a correlation coefficient of r = - 0.97 generally imply about the graph of a data set? a) the slope is positive, and a linear model is a good fit for the data. b) the slope is negative, and a linear model is a good fit for the data. c) the slope is positive, and a linear model is not a good fit for the data. d) the slope is negative, and a linear model is not a good fit for the data.

answer: -1

step-by-step explanation:

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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