- The scatter diagrams below were drawn by a student.
$$\begin{aligned}
& y \underset { x } { \begin{array} { l l l l }
& &
+ & & &
+ & + & + &
+ & + & +
\end{array} }
\end{aligned}$$
The student calculated the value of the product moment correlation coefficient for each of the sets of data.
The values were
$$\begin{array} { l l l }
0.68 & - 0.79 & 0.08
\end{array}$$
Write down, with a reason, which value corresponds to which scatter diagram.
(6)