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Find the equation for the least squares regression line of the data described below.$\newline$Doug is a math teacher at a large school. He wonders if his test problems are too wordy. Doug is curious whether the wordiness is affecting student performance.$\newline$For the last several tests, Doug computes the average number of words in each question, $x$, as well as the average percentage scores on the tests, $y$.$\newline$\begin{tabular}{|c|c|}$\newline$\hline Average question length & Average student score \\$\newline$\hline $10$.$87$ & $81$.$55$ \\$\newline$\hline $15$.$74$ & $72$.$28$ \\$\newline$\hline $17$.$05$ & $79$.$56$ \\$\newline$\hline $26$.$97$ & $67$.$27$ \\$\newline$\hline $31$.$47$ & $68$.$92$ \\$\newline$\hline $37$.$19$ & $78$.$85$ \\$\newline$\hline $45$.$90$ & $52$.$99$ \\$\newline$\hline $46$.$14$ & $65$.$48$ \\$\newline$\hline$\newline$\end{tabular}$\newline$Round your answers to the nearest thousandth.$\newline$$$y=\square x+$$