Question 610381
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Hi, 
My recommendation would be that You become familiar with either a TI Calculator
or Excel functions/Stat Tool for making Your statistical calculations.
For ex:
using Excel CORREL function:
entering Data Given...
correlation coefficient = {{{-.9537}}}
Using www.easycalculation.com/statistics/regression.php 
Entering Data Given...
y = 96-8.8x
final grade of a student who misses 3.5 days
y = 96-8.8(3.5) = {{{65.2}}}