\begin{definition}[Definition:Cartesian Plane/Quadrants/First]
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Quadrant $\text{I}: \quad$ The area above the $x$-axis and to the right of the $y$-axis is called '''the first quadrant'''.
That is, '''the first quadrant''' is where both the $x$ coordinate and the $y$ coordinate of a point are positive.
\end{definition}