document.write( "Question 698998: Write an equation of the line that is parallel to the given line and passes through the given point.(I forgot how to solve these, just need a few examples)
\n" ); document.write( "1) y = 3 x - 1, (0,2)
\n" ); document.write( "2) y = x + 3, (1,2)
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Algebra.Com's Answer #431155 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line

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\n" ); document.write( " Since any two parallel lines have the same slope we know the slope of the unknown line is \"3\" (its from the slope of \"y=3%2Ax-1\" which is also \"3\").\n" ); document.write( "Also since the unknown line goes through (0,2), we can find the equation by plugging in this info into the point-slope formula
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\n" ); document.write( " Point-Slope Formula:
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\n" ); document.write( " \"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point
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\n" ); document.write( " \"y-2=3%2A%28x-0%29\" Plug in \"m=3\", \"x%5B1%5D=0\", and \"y%5B1%5D=2\"
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\n" ); document.write( " \"y-2=3%2Ax-%283%29%280%29\" Distribute \"3\"
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\n" ); document.write( " \"y-2=3%2Ax-0\" Multiply
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\n" ); document.write( " \"y=3%2Ax-0%2B2\"Add \"2\" to both sides to isolate y
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\n" ); document.write( " \"y=3%2Ax%2B2\" Combine like terms
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\n" ); document.write( " So the equation of the line that is parallel to \"y=3%2Ax-1\" and goes through (\"0\",\"2\") is \"y=3%2Ax%2B2\"
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\n" ); document.write( " So here are the graphs of the equations \"y=3%2Ax-1\" and \"y=3%2Ax%2B2\"
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\n" ); document.write( " graph of the given equation \"y=3%2Ax-1\" (red) and graph of the line \"y=3%2Ax%2B2\"(green) that is parallel to the given graph and goes through (\"0\",\"2\")
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Solved by pluggable solver: Finding the Equation of a Line Parallel or Perpendicular to a Given Line

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\n" ); document.write( " Remember, any two perpendicular lines are negative reciprocals of each other. So if you're given the slope of \"1\", you can find the perpendicular slope by this formula:
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\n" ); document.write( " \"m%5Bp%5D=-1%2Fm\" where \"m%5Bp%5D\" is the perpendicular slope
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\n" ); document.write( " \"m%5Bp%5D=-1%2F%281%2F1%29\" So plug in the given slope to find the perpendicular slope
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\n" ); document.write( " \"m%5Bp%5D=%28-1%2F1%29%281%2F1%29\" When you divide fractions, you multiply the first fraction (which is really \"1%2F1\") by the reciprocal of the second
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\n" ); document.write( " \"m%5Bp%5D=-1%2F1\" Multiply the fractions.
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\n" ); document.write( " So the perpendicular slope is \"-1\"
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\n" ); document.write( " So now we know the slope of the unknown line is \"-1\" (its the negative reciprocal of \"1\" from the line \"y=1%2Ax%2B3\").\n" ); document.write( "Also since the unknown line goes through (1,2), we can find the equation by plugging in this info into the point-slope formula
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\n" ); document.write( " Point-Slope Formula:
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\n" ); document.write( " \"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where m is the slope and (\"x%5B1%5D\",\"y%5B1%5D\") is the given point
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\n" ); document.write( " \"y-2=-1%2A%28x-1%29\" Plug in \"m=-1\", \"x%5B1%5D=1\", and \"y%5B1%5D=2\"
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\n" ); document.write( " \"y-2=-1%2Ax%2B%281%29%281%29\" Distribute \"-1\"
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\n" ); document.write( " \"y-2=-1%2Ax%2B1\" Multiply
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\n" ); document.write( " \"y=-1%2Ax%2B1%2B2\"Add \"2\" to both sides to isolate y
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\n" ); document.write( " \"y=-1%2Ax%2B3\" Combine like terms
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\n" ); document.write( " So the equation of the line that is perpendicular to \"y=1%2Ax%2B3\" and goes through (\"1\",\"2\") is \"y=-1%2Ax%2B3\"
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\n" ); document.write( " So here are the graphs of the equations \"y=1%2Ax%2B3\" and \"y=-1%2Ax%2B3\"
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\n" ); document.write( "
\n" ); document.write( " graph of the given equation \"y=1%2Ax%2B3\" (red) and graph of the line \"y=-1%2Ax%2B3\"(green) that is perpendicular to the given graph and goes through (\"1\",\"2\")
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