Answer: If the relationship between two quantities is a proportional relationship, this relationship can be represented by the graph of a straight line through the origin with a slope equal to the unit rate.
If the relationship between two quantities is a proportional relationship, this relationship can be represented by the graph of a straight line through the origin with a slope equal to the unit rate.
It is a way to represent a fraction by a set of common denominators: 1/10, 1/100... The advantage of decimals is that because all of them are in common denominators already, addition, subtraction and comparing are quite straightforward. To convert decimal to fraction is very simple, 3.14=314/100.
