document.write( "Question 22507: Find the slope of the graph of the linear function of f\r
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document.write( "f(6) = -1, F(3)=8 I know the answer (-3) I just don't know how to get it. \n" );
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Algebra.Com's Answer #10958 by Earlsdon(6294)![]() ![]() ![]() You can put this solution on YOUR website! Try this: \n" ); document.write( "Start with the slope-intercept form. \n" ); document.write( "f(x) = mx+b Now write two equations using the given data.\r \n" ); document.write( "\n" ); document.write( "f(6) = m(6)+b = -1 \n" ); document.write( "f(3) = m(3)+b = 8 Solve this system of equations by subtracting one from the other to find the slope, m.\r \n" ); document.write( "\n" ); document.write( "6m + b = -1 \n" ); document.write( "-(3m + b = 8) \n" ); document.write( "---------- \n" ); document.write( "3m = -9 Divide both sides by 3 \n" ); document.write( "m = -3\r \n" ); document.write( "\n" ); document.write( "The slope is -3. \n" ); document.write( " |