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Find the equation for the least squares regression line of the data described below.
Stem and Leaf Agriculture wants to add a new compound to its bags of sunflower fertilizer. The company produced several bags containing varying amounts of the compound to see how it would affect sunflower growth.
Next, Stem and Leaf collected data on the amount of the compound added to each bag (in grams), $x$, and the weekly growth of the sunflowers treated with each bag (in centimeters), $y$. \begin{tabular}{|c|c|} \hline 4) Amount of compound & D) \\ \hline 11 & 13 \\ \hline 22 & 11 \\ \hline 37 & 34 \\ \hline 77 & 28 \\ \hline 80 & 34 \\ \hline \end{tabular}
Round your answers to the nearest thousandth. $y=$ $\square$ $x+$