document.write( "Question 52346: The graph of the relation y-x^2 = 1/2x+y is stretched vertically by a factor of 4 and stretched horizontally by a factor of 7. Give the equation of the relation described by this new geaph \n" ); document.write( "
Algebra.Com's Answer #34946 by ChillyWiz(11)\"\" \"About 
You can put this solution on YOUR website!
Think... when an equation is \"stretched\", what happens?\r
\n" ); document.write( "\n" ); document.write( "To stretch a whole function by a factor of 4 vertically, f(x) -> 4*f(x)
\n" ); document.write( "To stretch a whole function by a factor of 7 horizontally, f(x) -> f(x/7)\r
\n" ); document.write( "\n" ); document.write( "But since this is an relation, lets solve for x instead of y
\n" ); document.write( "\"y-x%5E2+=+%281%2F2%29x+%2B+y\"
\n" ); document.write( "\"-x%5E2+=+%281%2F2%29x\"
\n" ); document.write( "\"x+=+-2x%5E2\"
\n" ); document.write( "\"2x%5E2%2Bx=0\"
\n" ); document.write( "\"x%282x%2B1%29=0\"\r
\n" ); document.write( "\n" ); document.write( "This is basically the graph of two vertical lines\"x=0\" \"x=-%281%2F2%29\"\r
\n" ); document.write( "\n" ); document.write( "a vertical line stretched 4 times vertically will still be the same
\n" ); document.write( "a vertical line stretched 7 times horizontally will still be the same\r
\n" ); document.write( "\n" ); document.write( "The stretched relation will still be the same as the original equation.\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );