To represent something means using a symbol to stand for something else. In math, we use various characters to stand for something else. Here is a table of common representations in math:
|Representation||What it means|
|π||This represents the ratio of the circumference of a circle to its diameter.|
|A variable||A variable represents a quantity which is unknown or can change (can vary).|
|9/3||An improper fraction can be a representation of a whole number. In this case, 9/3 is the same as the whole number 3.|
|A graph can be used to represent a function|
|A table can be used to represent a function.|
We use representations in algebra so the same symbol always means the same thing, and so we can write about a concept without a lot of words.
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