document.write( "Question 949546: A company has a manufacturing plant that is producing quality lamps. They find that in order to produce 250 lamps in a month, it will cost $7150. Also, to produce 310 lamps in a month, it will cost $8050. Find an equation in the form y = m x + b, where x is the number of lamps produced in a month and y is the monthly cost to do so.\r
\n" ); document.write( "\n" ); document.write( "I figured out that the slope is 15 but I'm not sure how to calculate \"b\". Can someone please help me? \n" ); document.write( "
Algebra.Com's Answer #579722 by macston(5194)\"\" \"About 
You can put this solution on YOUR website!
y=mx+b You have x and y given, plug them in with your calculated m and solve.
\n" ); document.write( "If m=15 is correct:
\n" ); document.write( "y=15x+b Using 250 and $7150:
\n" ); document.write( "$7150=15(250)+b Subtract 15(250) from each side.
\n" ); document.write( "$7150-15(250)=b
\n" ); document.write( "3400=b
\n" ); document.write( "CHECK with the other:
\n" ); document.write( "y=15x+b Using 310 and $8050
\n" ); document.write( "$8050=15(310)+b
\n" ); document.write( "$8050-15(310)=b
\n" ); document.write( "3400=b
\n" ); document.write( "ANSWER: The equation is y=15x+3400. \r
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