SOLUTION: The average gasoline price per gallon (in cities) and the cost of a barrel of oil are shown below for a random selection of weeks from 2009-2010. Oil 73.54. 61.28. 72.

Question 1081977: The average gasoline price per gallon (in cities) and the cost of a barrel of oil are shown below for a random selection of weeks from 2009-2010.
Oil 73.54. 61.28. 72.94. 53.29 60.50 42.67
Gasoline 2.818 2.262 2.864 2.352 2.691 2.258
The correlation coefficient for the data is r = 0.832 and a = 0.05. Find the equation of the regression line. Round the coefficient to 3 decimal places.
y� = a + bx
A= ?
B= ?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Using cost of gas as the dependent variable and the price of oil as the independent variable
Y=0.020x+1.333
A=0.020
B=1.333
r^2 is 0.69, the square of r.
This can be done by hand, but entering data into L1 and L2 then doing linear regression on STAT CALC 4 ENTER is the result with these data.
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