Refer to Exercise 38. During March, the average temperature was 46.4°F and Joan used an average of 490 cubic feet of gas per day. Calculate and interpret the residual for this month.

Exercise 38.

Joan is concerned about the amount of energy she uses to heat her home. The scatterplot shows the relationship between x = mean temperature in a particular month and y = mean amount of natural gas used per day (in cubic feet) in that month, along with the regression line ŷ =1425−19.87x .

Transcribed Image Text:

900 800 700 600 500 400 300 200 30 35 40 45 50 55 60 Temperature (°F) Gas consumed (cubic ft)