15.12 state sat scores. the correlation between the average sat mathematics score in the states and the percent of high school seniors who take the sat is
r
=
−0.89
r=−0.89
.
(a) the correlation is negative. what does that tell us?
(b) how well does proportion taking predict average score? (use
r
2
r2
in your answer.)

10000000000000000000000000000000

11

step-by-step explanation:

32.50-7.50=25

225/25=11

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.