In the bouncy ball lab we were attempting to create a ball with optimum bounce and a smooth, slick texture. we used a system of changing one variable at a time, finding the optimum amount of one concentration of solution until the best was found, then using that amount of solution in different concentrations while the other two variables were again controlled. this matters because in changing only one variable at a time, we can determine what proportions actually change the outcome of the bouncy ball eventually we found that the best proportion was 15 grams of borax to 100 ml. and solution to glue was 1 ml to 10 grams. The proportion to borax to glue changes the intensity of the polymerization.