In a Study of Reaction Times, the Time to Respond

In a study of reaction times, the time to respond to a visual stimulus (x) and the time to respond to an auditory stimulus (y) were recorded for each of 8 subjects. Times were measured in thousandths Of a second. The results are presented in the following table.

$\begin{array} { c c } \hline \text { Visual } & \text { Auditory } \\\hline 193 & 189 \\240 & 222 \\239 & 226 \\236 & 225 \\200 & 189 \\161 & 158 \\214 & 209 \\204 & 193 \\\hline\end{array}$

Construct a 95% confidence interval for the slope of the least-squares regression line.

A) (21.1376, 21.3239)
B) (0.7611, 0.9474)
C) (21.1134, 21.3481)
D) (0.7370, 0.9716)