If the temperature is converted to degrees Celsius and the electricity used to kilowatt-hours, how will the value of r be affected?

Correlation does not change when either variable is converted using a positive linear transformation. Converting Fahrenheit to Celsius subtracts 32 and multiplies by 5/9; converting watt-hours to kilowatt-hours divides by 1,000. These changes alter the units and numerical values, but not the correlation, so it stays the same because correlation is unitless.

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