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in this video weamp;#39;re going to cover the delete last dot button so we want to go through and get the click event for our delete last button and weamp;#39;re going to set that up we want to think about that click button what does it do it deletes the last item in both the x-values list and the y-values list okay so whatever the last item is itamp;#39;ll delete it so if you have one for five in the x-values it will chop off five and all its left is one in four okay so we want to remove something from that list and if we think about that itamp;#39;s got to be in the list box somewhere so if we think we move it over here just for space sake the list blocks have all these blocks you can replace we can insert finally we get to error and move we can remove an item all right so remove the list item from what list well weamp;#39;ll start with our X values from our x values list which item do we want to remove so in our example we had one four and five I think letamp;#39;s say we have