The sum must be irrational in contradiction to it being rational
What type of graphs
if it is a bar graph look at the hights or the ranges
if it is a line graph look at how much it drops or how much it raises by
if it is just any kind of graph look at y and x axis how much does it skip
7 x 4 = 28
To get 33 is you add 28 and 5 to get 33