The Two Data Sets Are Dependent $\bar { d }$ To the Nearest Tenth

Multiple Choice

The two data sets are dependent. Find $\bar { d }$ to the nearest tenth.
- $$\begin{array} { c | c c c c c c } \mathrm { X } & 8.3 & 5.3 & 7.9 & 8.5 & 6.8 & 5.7 \\\hline \mathrm { Y } & 8.1 & 7.5 & 9.5 & 7.7 & 8.1 & 9.3\end{array}$$

A) -0.8
B) -1.3
C) -7.8
D) -1.7