document.write( "Question 1203210: If the line l1 and the line y = -x+2 are symmetric about the y-axis, the equation of the line l1 is...? \n" ); document.write( "

Algebra.Com's Answer #838590 by math_helper(2461) $\"\"$ $\"About$

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document.write( "If y=f(x) is a line, and you wish to obtain the reflection about the y-axis, you replace \"x\" with \"-x\" everywhere:\r
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document.write( "y = f(x) = -x+2\r
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document.write( "so the reflection about the y-axis is:
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document.write( "f(-x) = -(-x)+2 = x+2    \n" );
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