# Using a regression equation to calculate the correlation coefficient.

The owner of an office building studies heating cost versus daily high temperatures. He records the following data:

Temperature (deg C) @ Cost ($100)

-------------------------------

1 @ 9

4 @ 5

6 @ 3

10 @ 2

He proposes a regression equation to predict the cost of heating the building.

What is the predicted heating cost for a day with a high temperature of 8 degrees C and what is the correlation coefficient?

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...ing cost) ---- X(temperature)

1-----------------------------9

4----------------------------- 5

6----------------------------- 3

10---------------------------- 2

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<br>When we run a ...