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Question

Heating After keeping track of his heating expenses for

several winters, a homeowner believes he can estimate

the monthly cost ($) from the average daily Fahrenheit

temperature with the model Cost = 133 - 2.13 Temp.

Here is the residuals plot for his data:a) Interpret the slope of the line in this context.

b) Interpret the y-intercept of the line in this context.

c) During months when the temperature stays around

freezing, would you expect cost predictions based on

this model to be accurate, too low, or too high? Explain.

d) What heating cost does the model predict for a month

that averages 10°?

e) During one of the months on which the model was

based, the temperature did average 10°. What were the

actual heating costs for that month?

f) Should the homeowner use this model? Explain.

g) Would this model be more successful if the

temperature were expressed in degrees Celsius?

Explain.

Tagged in

Math

Statistics

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Transcribed Image Text

$20 $10 Avg Temp $0 10 20 30 40 -$10 -$20 Residual