document.write( "Question 38013: Please help me solve the following problem.\r
\n" ); document.write( "\n" ); document.write( "Interest rate. A credit manager rates each applicant for a car loan on a scale of 1 through 5 and than determines the interest rate from the accompanying table. Find the equation of the line in slope intercept form that goes through these points.\r
\n" ); document.write( "\n" ); document.write( "Credit Rating Interest Rate%
\n" ); document.write( " 1 24
\n" ); document.write( " 2 20
\n" ); document.write( " 3 16
\n" ); document.write( " 4 12
\n" ); document.write( " 5 8\r
\n" ); document.write( "\n" ); document.write( "Thank you so much for your help \n" ); document.write( "

Algebra.Com's Answer #23524 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
1 24
\n" ); document.write( "2 20
\n" ); document.write( "3 16
\n" ); document.write( "4 12
\n" ); document.write( "5 8 \r
\n" ); document.write( "\n" ); document.write( "The line will have the form y=mx+b.
\n" ); document.write( "Take any two of the paired numbers; solve for m, then for b, as follows:
\n" ); document.write( "If we choose (2,20) and (5,8) you get:
\n" ); document.write( "m=[(20-8)/(2-5)]=12/-3=-4
\n" ); document.write( "Substitute a value for x,y, and m into y=mx+b to find b, as follows:
\n" ); document.write( "20=(-4)(2)+b
\n" ); document.write( "b=28
\n" ); document.write( "So the equation you want is y=-4x+28
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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