How to predict the product of synthesis

When two elements combine in a synthesis reaction, the only product that can be made is a binary compound: A + B = AB. If two compounds combine in a synthesis reaction, they can form a ternary compound, which is a compound made up of three elements: AB + BC = ABC.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).