Assume It Costs 25 Cents to Mail a Letter Weighing $\mathrm { L } ( \mathrm { x } )$

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 $x$ ounces. Graph $y = \mathrm { L } ( \mathrm { x } )$ .

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