document.write( "Question 59434: find the equation of the line through the two points (3,4) and (2,-1); write the equation in the slope intercept form and find the x and y intercept of the line. \r
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Algebra.Com's Answer #40736 by funmath(2933)\"\" \"About 
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Find the equation of the line through the two points (3,4) and (2,-1); write the equation in the slope intercept form and find the x and y intercept of the line.
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\n" ); document.write( "In order to write the equation of a line, we need a point and a slope.
\n" ); document.write( "We don't have a slope, so we need to use the slope formula: \"m=%28y2-y1%29%2F%28x2-x1%29\" , m=slope, (x1,y1) and (x2,y2) are given points.
\n" ); document.write( "(x1,y1)=(3,4) and (x2,y2)=(2,-1)
\n" ); document.write( "\"m=%28-1-4%29%2F%282-3%29\"
\n" ); document.write( "\"m=-5%2F-1\"
\n" ); document.write( "\"m=5\"
\n" ); document.write( "Now we can find the equation of the line using the point-slope formula to find the equation of the line. \"highlight%28y-y1=m%28x-x1%29%29\", m=slope, (x1,y1) is a point on the line.
\n" ); document.write( "m=5, (x1,y1)=(3,4)
\n" ); document.write( "\"y-4=5%28x-3%29\"
\n" ); document.write( "\"y-4=5x-15\"
\n" ); document.write( "\"y-4%2B4=5x-15%2B4\"
\n" ); document.write( "\"highlight%28y=5x-11%29\" This is in slope intercept form: \"highlight%28y=mx%2Bb%29\", where m=slope and (0,b)=y-intercept.
\n" ); document.write( "The y-intercept is (0,-11)
\n" ); document.write( "To find the x-intercept, let y=0 and solve for x:
\n" ); document.write( "\"0=5x-11\"
\n" ); document.write( "\"11=5x-11%2B11\"
\n" ); document.write( "\"11=5x\"
\n" ); document.write( "\"11%2F5=5x%2F5\"
\n" ); document.write( "\"11%2F5=x\"
\n" ); document.write( "\"2.2=x\"
\n" ); document.write( "The y-intercept is (2.2,0)
\n" ); document.write( "In case you'd like to see the graph of the line for fun:
\n" ); document.write( "\"graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C5x-11%29\"
\n" ); document.write( "Happy Calculating!!!
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