document.write( "Question 122485: Please help I do not understand what graphing this at all. Thanks so much for any help given.
\n" ); document.write( "I am to graph the equation and identify the y intercept.
\n" ); document.write( "y + x = -3 \n" ); document.write( "
Algebra.Com's Answer #89924 by ankor@dixie-net.com(22740)\"\" \"About 
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I am to graph the equation and identify the y intercept.
\n" ); document.write( "y + x = -3
\n" ); document.write( ":
\n" ); document.write( "Put the equation in the general y= form
\n" ); document.write( "y = -x - 3; subtracted x from both sides:
\n" ); document.write( ":
\n" ); document.write( "Make a table of x/y coordinates, we do this like this
\n" ); document.write( "Choose values for x above and below 0 and find y
\n" ); document.write( ":
\n" ); document.write( "For x = -3; substitute - 3 for x in the equation and find y:
\n" ); document.write( "y = -(-3) -3
\n" ); document.write( "y = +3 - 3; remember minus a minus is a plus
\n" ); document.write( "y = 0
\n" ); document.write( ":
\n" ); document.write( "Our table
\n" ); document.write( " x | y
\n" ); document.write( "--------
\n" ); document.write( "-3 | 0; means \"when x=-3 then y=0
\n" ); document.write( ":
\n" ); document.write( "Do the same with x = -2
\n" ); document.write( "y = -(-2) - 3
\n" ); document.write( "y = +2 - 3
\n" ); document.write( "y = -1
\n" ); document.write( ":
\n" ); document.write( "Add that to the table
\n" ); document.write( " x | y
\n" ); document.write( "-------
\n" ); document.write( "-3 | 0
\n" ); document.write( "-2 |-1
\n" ); document.write( ":
\n" ); document.write( "Do the same for x values of -1, 0, +1, +2, +3
\n" ); document.write( "The completed table:\r
\n" ); document.write( "\n" ); document.write( "x | y
\n" ); document.write( "-------
\n" ); document.write( "-3 | 0
\n" ); document.write( "-2 |-1
\n" ); document.write( "-1 |-2
\n" ); document.write( " 0 |-3
\n" ); document.write( "+1 |-4
\n" ); document.write( "+2 |-5
\n" ); document.write( "+3 |-6
\n" ); document.write( ":
\n" ); document.write( "Plot these on a standard +/-10, x/y graph; it should look like this
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-5%2C+5%2C+-10%2C+10%2C+-x-3%29+\"
\n" ); document.write( ":
\n" ); document.write( "The y intercept occurs where it crosses the y (vertical) axis and always occurs
\n" ); document.write( "when x = 0, which is y = -3 on this equation
\n" ); document.write( "Note that the y = -3 at the intercept always occurs when x = 0
\n" ); document.write( ":
\n" ); document.write( "You probably realize that a linear equation we have a straight line and could
\n" ); document.write( "plot this with only 2 points in the table. \n" ); document.write( "
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