Calculate correlation and investigate a radiation outlier

The data show the intensity $I$ of radiation from a substance after time $t$.

$t$	$I$
0.2	3
0.4	3.5
0.6	1.3
0.8	0.6
1.0	0.4
1.2	0.2

(i) Use a suitable diagram to explain why the product moment correlation coefficient between $I$ and $t$ is negative and not very close to $-1$.

(ii) By using the formula for $r$, calculate the product moment correlation coefficient between $t$ and $I$.

(iii) State the coordinates of a point in the diagram in (i) which does not seem to follow the linear trend. If it is removed, without any calculations, explain why $r$ is closer to $-1$.