Chapter 1, Problem 30T

(a)

To determine

To calculate: The least squares regression line. Also, round the slope and $y\text{-intercept}$ to $1$ decimal place.

$\begin{array}{|cc|}\hline \text{Week number,}x& \text{Number of attendees,}y\\ 1& 8\\ 3& 21\\ 6& 30\\ 9& 40\\ 12& 46\\ 15& 56\\ 18& 68\\ \hline\end{array}$

(b)

To determine

To graph: The data to find the least squares regression line of the people $y$ that attended a weekly bingo game at an adult recreation center is given in the table for selected weeks, $x$ . Also, round the slope and $y\text{-intercept}$ to $1$ decimal place.

$\begin{array}{|cc|}\hline \text{Week number,}x& \text{Number of attendees,}y\\ 1& 8\\ 3& 21\\ 6& 30\\ 9& 40\\ 12& 46\\ 15& 56\\ 18& 68\\ \hline\end{array}$

(c)

To determine

To calculate: The number of attendees in week $24$ , if the linear trend continues.