document.write( "Question 1131649: Robinson Wholesale Company paid $1330 for 500 items. Later they bought 800 items for $1750. Assume that the cost is a linear function of the number of items. Write the equation. (Let y represent the amount paid and x represent the number of items purchased.) \n" ); document.write( "
Algebra.Com's Answer #748324 by josgarithmetic(39630)\"\" \"About 
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Equation for the line containing points (500, 1330) and (800, 1750).\r
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\n" ); document.write( "\n" ); document.write( "\"y-1330=%28%281750-1330%29%2F%28800-500%29%29%28x-500%29\"\r
\n" ); document.write( "\n" ); document.write( "Simplify.
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