The Sample Data Below Are the Typing Speeds (In Words

Essay

The sample data below are the typing speeds (in words per minute) and reading speeds (in words per minute)
of nine randomly selected secretaries. Here, x denotes typing speed, and y denotes reading speed. $$\begin{array} { l l l l l l l l l l | } \hline x & 60 & 56 & 52 & 63 & 70 & 58 & 44 & 79 & 62 \\\hline \mathrm { y } & 370 & 551 & 528 & 348 & 645 & 454 & 503 & 618 & 500 \\\hline\end{array}$$ The regression equation $$\hat { \mathrm { y } } = 290.2 + 3.502 \mathrm { x }$$ was obtained. Construct a residual plot for the data.