# Math

Alex puts his spare change in a jar every night. If he has \$11.09 at the end of January, \$22.27 at the end of February, \$44.35 in April, \$75.82 in July, \$89 in August, and \$114.76 at the end of October, perform a linear regression on this data to complete the following items.

Note: I can't seem to perform a linear regression on my calculator correctly.

1. What does the value of the correlation coefficient tell you about the correlation of the data?

2. Write the equation of the best-fitting line. (Round to the nearest thousandths)

3. On average, how much money does Alex add to the jar each month?

4. Alex wants to buy a video game console at the end of December for \$140. Will he have enough for this purchase? (Show work)

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1. dunno about your calculator, but at

http://www.alcula.com/calculators/statistics/linear-regression/

we get

y = 11.33x - 0.90

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posted by Steve
2. what does the value of the correlation coefficient tell you about the correlation of the data ?

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posted by Thomas

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