## Precalculus (6th Edition) Blitzer

Let us say one has a sequence $\left\{ {{a}_{n}} \right\},n=1,2,3,...$ When we plot the points (x, ${{a}_{n}}$ ) on the graph. We observe that the graph plotted is not continuous and discrete. Since the sequence contains all the discrete points, therefore the plot of the sequence must be a discrete plot.