Enter a number between 0 and 14, inclusive, in the "Day after birth" box, then click "OK". The point (t, W(t)), with t corresponding to the value you entered, will be plotted on the graph and the actual numerical value of W(t) will be displayed in the scale.


In the "Estimate min day" box, enter a guess for the day (real number value) that the baby's minimum weight occurs, then click "OK". If your guess is within 0.1 of the actual value (day), then you will be told you're correct and the entire graph will be graphed. If your guess is not within 0.1 of the actual value (day), then you will be told to continue entering more numbers in the "Day after birth" box so that you can formulate a better guess at the day that the baby's minimum weight occurs.