document.write( "Question 1157013: 20.\r
\n" ); document.write( "\n" ); document.write( "I need help graphing the following and listing the directions,vertex,axis of symmetry,table with 5 points and the graph for this equation\r
\n" ); document.write( "\n" ); document.write( "f(x)=x^2-2x-5 \n" ); document.write( "
Algebra.Com's Answer #779790 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
the vertex x point is at -b/2a and b is -2 and a is the coefficient of x or 1
\n" ); document.write( "so the vertex x point is +1
\n" ); document.write( "f(1)=1-2-5=-6
\n" ); document.write( "so the vertex is at (1, -6)\r
\n" ); document.write( "\n" ); document.write( "The axis of symmetry is the x-value or x=1\r
\n" ); document.write( "\n" ); document.write( "for 5 points,
\n" ); document.write( "first pick x=0, and f(0)=-5. that is easy
\n" ); document.write( "the vertex is a point, so you have that.
\n" ); document.write( "Try -1 and you get 1+2-5=-2
\n" ); document.write( "try 2 and you get -5
\n" ); document.write( "because -1 is two units away from 1, and +3 is two units away from 1, and the function is symmetrical, the y-values are the same. So f(-1)=f(3)=-2
\n" ); document.write( "if you look at f(-2) three units from the axis, f(4) is also 3 units away, and they have the same y-value.\r
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\n" ); document.write( "\n" ); document.write( "\"graph%28300%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2-2x-5%29\" \n" ); document.write( "
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