Scores on required state math tests along with school attendance (days) were collected for 72 sixth grade students. The standardized z-scores of the test results and those of the students' attendance days were calculated and the pairs multiplied together. The sum of these 72 products was 57.15 . Based on this sum, what can you conclude about the correlation between math scores and days of attendance?

y=mx+b is the final answer!   : )

answer: what is the question you're trying to ask?

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.

a reflection across the x axis and a 90 degree rotation left and right.