Sketch the eleven insulin and time observations

1. Press STAT and select 1:Edit.
2. Enter insulin values in L1 and the corresponding time values in L2, in the same row order.
3. Press 2nd, then Y= to open statistical plots.
4. Press ENTER for Plot1, select ON, and choose the first graph-type icon (scatter). Set Xlist=L1, Ylist=L2.
5. Press ZOOM, then 9:ZoomStat to fit all observations into the window.
6. Press TRACE. Use left/right arrows to move between observations and check the displayed coordinates.

These are the six printed procedure steps; the menu screenshots’ mathematical inputs are retained in text. For example, the first pair is (40,4.10), not an insulin value paired with another row’s time.

The supplied sketch plots all eleven observations. Label both axes and the extreme data values. The figure here uses cropped, explicitly nonzero axes and no fitted line. The original marks its lower-left corner O even though the time scale is cropped; do not read that corner as the true point (0,0). Check the nearby points carefully: time rises from 3.72 at 180 to 3.77 at 210, then falls again.

This describes the observed sample; it does not mean that every successive pair decreases or establish a causal rule from the scatter alone. The visible Student page leaves the description space blank, while the retained PDF text contains a decreasing-time sentence. That native-versus-visible distinction is recorded: the explanatory completion here is checked directly against all eleven data pairs.