Regression with technology
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A shop records the daily high temperature (\(^\circ\)F) and its ice-cream sales (\$). \[ \begin{array}{|c|c|c|c|c|c|c|} \hline \text{Temp } x & 60 & 65 & 70 & 75 & 80 & 85 \\ \hline \text{Sales } y & 122 & 151 & 168 & 191 & 213 & 236 \\ \hline \end{array} \] A graphing calculator reports the linear regression \(a = 4.36\), \(b = -136.61\). Write the \(\textbf{line of best fit}\) in the form \(y = ax + b\).
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