document.write( "Question 1133393: Find the slope of the line through the points P and Q when:\r
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document.write( "a. P(1,3) and Q(x, x2+3x-1)\r
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document.write( "b. P(x, x2+3x-1) and Q(x+h, (x+h)2+3(x+h)-1) \n" );
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Algebra.Com's Answer #750599 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! slope = rise/run = (y2 -y1)/(x2 -X1) where (x1,y1) and (x2,y2) are two points \n" ); document.write( ": \n" ); document.write( "a) slope = (x^2+3x-1 -3)/(x-1) = ((x+4)*(x-1))/(x-1) = x+4 \n" ); document.write( ": \n" ); document.write( "b) slope = ((x+h)^2+3(x+h)-1 -(x^2+3x-1))/(x+h-x) = (x^2+2xh+h^2+3x+3h-1-x^2-3x+1)/h = (h^2+3h+2xh)/h = h+2x+3 \n" ); document.write( ": \n" ); document.write( "Note assume h is not equal to 0 \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( " |