A random sample of records of electricity usage of homes gives the amount of electricity used in July and size (in square feet)of 135 homes.A regression to predict the amount of electricity used (in kilowatt-hours)from size was completed.What are the variables and units in this regression?
A)Amount of electricity used (in kilowatt-hours)is y and size (in square feet)is x.
B)Amount of electricity used (in kilowatt-hours)is y and number of homes is x.
C)Size (in square feet)is y and amount of electricity used (in kilowatt-hours)is x.
D)Size (in square feet)is y and number of homes is x.
E)Number of homes is y and amount of electricity used (in kilowatt-hours)is x.

Question

Quizplus · Accepted Answer

The dependent variable is the amount of electricity used (in kilowatt-hours), denoted by y, and the independent variable is the size (in square feet) of homes, denoted by x, used to predict y. Therefore, choice A is the correct answer. The other options do not correctly identify the variables and their units in the regression.

A Random Sample of Records of Electricity Usage of Homes