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.)

A negative correlation shows the relationship between two variables.

Step-by-step explanation: A) the correlation between the average SAT scores and percentage of high school seniors r = - 0.89 shows that the direction is negative and the relationship is strong.

B) SAT score = (-0.89 * proportion taking) + average score

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation:

p = 6s

step-by-step explanation: