To find the correlation coefficient \( r \) using technology, follow these steps (assuming you are using software like GeoGebra or a similar statistical tool):
-
Input the data: Enter the pairs of \( x \)-values and corresponding \( y \)-values into the software. You should enter the following data points:
- (1, 23)
- (5, 27)
- (7, 32)
- (11, 35)
- (15, 39)
- (17, 43)
-
Calculate the correlation: Use the statistical function or analysis tool to compute the correlation coefficient. In GeoGebra, you can use the command
Correlation[xList, yList]
wherexList
is the list of \( x \)-values andyList
is the list of \( y \)-values. -
Round the value: After the software provides the \( r \)-value, round it to two decimal places.
If you perform these steps correctly, you should find that the correlation coefficient, \( r \), is approximately 0.99.
Thus, the answer is:
\[ r = 0.99 \]