document.write( "Question 1012233: What is the equation of the line which: a) passes through the point (2, -7) and is parallel to y = 2; and b) passes through the point (-1, 2), and is parallel to the line x = 1 \n" ); document.write( "
Algebra.Com's Answer #628114 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "The lines whose equations are y = 2 and x = 1, are special lines,\r\n" );
document.write( "whose form is not recognizable as y = mx+b, because each contains\r\n" );
document.write( "only one letter variable.\r\n" );
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document.write( "Actually the first kind y = 2 can be placed in the form y = mx+b,\r\n" );
document.write( "because the slope is 0 and therefore it can be written y = 0x+2.\r\n" );
document.write( "y = 2 represents a horizontal line with y-intercept (0,2). It\r\n" );
document.write( "has no x-intercept.\r\n" );
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document.write( "Here it the graph of y = 2:\r\n" );
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document.write( "The second kind x = 1 cannot be written in the form y = mx+b at\r\n" );
document.write( "all.  That's because its slope is undefined.  It is a vertical \r\n" );
document.write( "line which is so steep that there is no possible number large \r\n" );
document.write( "enough to indicate how steep a vertical line is.  x = 1 represents \r\n" );
document.write( "a vertical line with x-intercept (1,0).  It has no y-intercept.\r\n" );
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document.write( "Here is the graph of x = 1:\r\n" );
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document.write( "You want a line that:\r\n" );
document.write( "

\n" ); document.write( "a) passes through the point (2, -7) and is parallel to y = 2;
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document.write( "So here is what you want:\r\n" );
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document.write( "The green line is also a special lines, just like the line it is\r\n" );
document.write( "parallel to, y = 2, and its form is also not recognizable as \r\n" );
document.write( "y = mx+b, because it will also contains only one letter variable x.\r\n" );
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document.write( "Answer: The green line's equation is y = -7\r\n" );
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document.write( "And y = -7 can be also placed in the form y = mx+b,\r\n" );
document.write( "because the slope is 0 and therefore it can be written y = 0x-7.\r\n" );
document.write( "y = -7 represents a horizontal line with y-intercept (0,-7). It\r\n" );
document.write( "has no x-intercept.  Notice that it did not matter in this case\r\n" );
document.write( "that the x-coordinate of the point was 2.  It could have been any\r\n" );
document.write( "other number and the answer would have still been y = -7.\r\n" );
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document.write( "You want a line in this part that:\r\n" );
document.write( "

\n" ); document.write( "b) passes through the point (-1, 2), and is parallel to the line x = 1
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document.write( "So here is what you want in this part:\r\n" );
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document.write( "The green line is also a special line, just like the line it is\r\n" );
document.write( "parallel to, x = 1, and its form is also not recognizable as \r\n" );
document.write( "y = mx+b, because it will also contains only one letter variable x.\r\n" );
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document.write( "Answer: The green line's equation is x = -1\r\n" );
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document.write( "This green line x = -1 also cannot be written in the form y = mx+b.\r\n" );
document.write( "That's because its slope is undefined.  x = -1 represents \r\n" );
document.write( "a vertical line with x-intercept (-1,0).  It has no y-intercept. \r\n" );
document.write( "Notice that it did not matter in this case that the y-coordinate of \r\n" );
document.write( "the point was 2.  It could have been any other number and the answer \r\n" );
document.write( "would have still been x = -1.\r\n" );
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document.write( "Edwin
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