50 ! !

two variables are correlated with r=−0.31.

which answer best describes the strength and direction of the association between the variables?

weak positive
weak negative
strong negative
strong positive

The r value is a number between -1 and +1.

For a negative value, the closer to -1 it would be a strong negative, if it is closer to 0, it would be a strong negative.

-0.31 is closer to 0 than -1, so it would have a strong negative association.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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answers

rauschg

rauschg · hand

know the answer? add it here!

step-by-step explanation:

imma say 16%. sorry if its wrong. i'm doing the same stuff right now

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