How I can shade area under graph in Mathcad Prime 3.1?

Richard Jackson wrote: I didn't write this, I just fished it out of my collection and converted it to Prime

Neat.  For simple plots, you can also get by using the Column trace type (I've also selected the "Cross Axes at 0,0" to get rid of the space between the plot proper and the x axis).  I've doubled up on the target function to highlight the edge.

Stuart

Ricardo Huaranga wrote: If the chart I think from a point table as it could color the area?

Do you mean something like this?

If so, just click on the y-axis variable you want (i in this case) and select "Column Trace" from the "Change Type" drop down.

Stuart