"Affordable" Diamond Pricing Imagine you have set out to purchase a diamond, and you want all the
information you can possibly get before the purchase. You run an Internet
search on diamonds to learn more about the different cuts, carat ranges, color
values, and so on. After having researched a bit, you've decided on the basic
cut, quality, color, and weight range that you can probably afford.
This diamond pricing spreadsheet e gives three snapshots of a large set of
data on diamond pricing. The 0.30-0.40 Carats tab gives the 2012 data on
diamonds ranging from 0.30 to 0.40 carats.
Part A
Go to the Subset tab, which gives a subset of randomly chosen data from the
first tab. Go to your Math Tools and open the Graph tool. Plot the data of
weight (carat) versus price in this tab using the +Data button (Note that you
can copy two columns of data and use "paste table data"). Export an image of
the plot, and paste it in the space below. Find the equation of the regression
line (using a Best Fit Linear relationship) and the value of the correlation
coefficient (0)

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explanation

the graph has a slope of 1/3 because each time you move up 1, you go to the right 3. so, slope = rise/run = 1/3. we can cross choice a off the list since we want a slope of 3, rather than 1/3.

the first table shown has a slope of -3. this is because the rise is -6 and the run is 2, so slope = rise/run = -6/2 = -3. note how x increases by 2 each time (run) and y drops by 6 each time (rise). choice b can be eliminated.

the second table has a slope of 3. each time x goes up by 1, the y values increase by 3. slope = rise/run = 3/1 = 3. alternatively you can use the slope formula to prove that the slope is 3 here. use any two rows of values to generate the two points. choice c is one of the answers

the third table also has a slope of 3. let's use the slope formula to prove as such. i'm going to use the first two rows of the table. so i'll use the two points (2,1) and (5,10)

m = slope

m = (y2-y1)/(x2-x1)

m = (10-1)/(5-2)

m = 9/3

m = 3 so we get a slope of 3

choice d is the other answer

14

step-by-step explanation:

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632