document.write( "Question 69306: Line AB has a slope of -6 and an x-intercept of 6. The y-value of point A is twice its x-value. Find the y-value of point A. \n" ); document.write( "
Algebra.Com's Answer #49460 by ankor@dixie-net.com(22740)\"\" \"About 
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Line AB has a slope of -6 and an x-intercept of 6. The y-value of point A is twice its x-value. Find the y-value of point A.
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\n" ); document.write( "We can use the slope equation (y2 - y1)/(x2 - x1) = m
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\n" ); document.write( "Let the x intercept be x1, y1: (6, 0)
\n" ); document.write( "let x2 = x; y2 = 2x
\n" ); document.write( "We know m = -6
\n" ); document.write( "Find x:
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\n" ); document.write( "(2x - 0)/(x - 6) = -6
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\n" ); document.write( "2x = -6(x - 6)
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\n" ); document.write( "2x = -6x + 36
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\n" ); document.write( "2x + 6x = 36
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\n" ); document.write( "8x = 36
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\n" ); document.write( "x = 36/8
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\n" ); document.write( "x = 4.5
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\n" ); document.write( "y = 2x therefore y = 9 at point A \r
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