Analyze the scatterplot graph.
which trend does the graph show?
as age increases, weight increases.
as weight decreases, age increases.
as age increases, weight remains the same.

As age increases, weight increases.  

Explanation:

The blue arrow shows the general trend of the dots.

If you trace the path of the arrow, your finger goes to the right, so age (on the horizontal axis) increases.

Your finger also goes up, so weight (on the vertical axis) increases.

Both things are happening at the same time, so, as age increases, weight increases.

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practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.