Definition of vector spaces

Let $X=\left\{1,2,\ldots,n\right\}$, and consider the space $\mathbf{Func}_{X,\mathbb{R}}$ of real-valued functions defined on $X$. Explain how $\mathbf{Func}_{X,\mathbb{R}}$ can be considered as $\mathbb{R}^{n}$.