Ononot — A utility company models monthly heating bills Y (in dollars

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Linear Modelingmedium

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A utility company models monthly heating bills $Y$ (in dollars) based on the average outdoor temperature $X$ (in $^\circ\text{F}$ ) using the model $\hat{y} = 420 - 5.5x$ . What is the correct interpretation of the intercept $420$ in this context?