Asquare has vertices j(-1,4),u(5,4),m(5,-2),p(-1,-2).aft er a dilation, square jump has vertices j(-0.5,2),u(2.5,2),m(2.5,-1),p(-0.5 ,-1).what is the scale factor of the dilation

Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s.   if they count at the same rate, what number will they say at the same time?