<PRE><B>Question 148456</B>
Assume it costs 25 cents to mail a letter weighing once ounce or less, and then 20 cents for each additional ounce or fraction of an ounce. 
Let L(x) be the cost of mailing a letter weighing x ounces. Solve and graph 
y=L(x). 
I started by doing y=L(x)+20 then I plugged in points for x. Am I headed in the right direction with this?
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The 20 gets added every time you add an ounce, so the 20 is the slope.
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L(x) = 20(x-1)+25
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{{{graph(400,300,-10,10,-10,100,20(x-1)+25)}}}
Cheers,
Stan H.</PRE>