Physics help pleasee?

i have been given a table of numbers and asked to plot them dividing the biggest number with how many squares i have on my graph paper. ..so i took 10"being the biggest number" divided by 27 squares on the x axis witch ='s .370...... i have to round it too 1,2,5,10?? would it be 1?? i am always getting messed up with the rounding step!! please help Me THanks