Graph the Step Function $\mathrm{L}(\mathrm{x})$ Be the Cost of Mailing a Letter Weighing

Graph the step function.
-Assume it costs 25 cents to mail a letter weighing one ounce or less, and then 20 cents for each additional ounce or fraction of an ounce. Let $\mathrm{L}(\mathrm{x})$ be the cost of mailing a letter weighing $\mathrm{x}$ ounces. Graph $y=L(x)$ . Use the interval $(0,4]$ .

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