document.write( "Question 391526: I need help understanding and graphing the equation to find the y-intercept
\n" ); document.write( "y+x=-7 \n" ); document.write( "
Algebra.Com's Answer #277887 by ankor@dixie-net.com(22740)\"\" \"About 
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I need help understanding and graphing the equation to find the y-intercept
\n" ); document.write( "y+x=-7
\n" ); document.write( "You need to put the equation into the slope/intercept form (y = mx + b)
\n" ); document.write( "where m is the slope and b is the y intercept (occurs when x=0)
\n" ); document.write( "y + x = -7
\n" ); document.write( "subtract x from both sides and you have
\n" ); document.write( "y = -x - 7, slope in this case m=-1
\n" ); document.write( ":
\n" ); document.write( "Choose at least two values for x, and find y
\n" ); document.write( "Let x = -3
\n" ); document.write( "y = -(-3) - 7
\n" ); document.write( "y = 3 - 7; minus a minus is a plus
\n" ); document.write( "y = -4
\n" ); document.write( "plot the ordered pair, x=-3, y=-4
\n" ); document.write( "and
\n" ); document.write( "Let x = +2
\n" ); document.write( "y = -2 - 7
\n" ); document.write( "y = -9
\n" ); document.write( "plot the ordered pair, x=2; y=-9
\n" ); document.write( ":
\n" ); document.write( "Join these two points with a straight line
\n" ); document.write( "the graph should look like this
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-8%2C+6%2C+-10%2C+10%2C+-x-7%29+\"
\n" ); document.write( "You can see the y intercept = -7, when x = 0 \n" ); document.write( "
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