The following scatter diagram displays the total life expectancy in years on the X axis and GDP per capita (constant 2000 $) on the Y axis, in Country S for the past 40 years. Which of the following statements is true in respect of the graph?

- A perfect positive linear relationship is shown in the diagram.
- In most years, the samples shows a clear negative trend in the diagram.
- There is no correlation between the level of GDP per capita and life expectancy.
- In some years, the level of GDP per capita and life expectancy moved in opposite directions.
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