## FANDOM

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The graph of a function $f\colon D\to R$ is the set of ordered pairs $(x,y)$ such that $x\in D,y\in R$ and $y=f(x)$ .

Symbolically:

$\text{graph}(f)=\Big\{(t,f(t))\in D\times R:t\in D\Big\}\subset D\times R$

i.e. $\text{graph}(f)$ is a subset of $D\times R$