document.write( "Question 64361: I need to graph the folliwing equations. Identify the vertex, intercepts and equation of the axis of symmetry. If a value is irrational , find a decimal approximation.\r
\n" ); document.write( "\n" ); document.write( "y=x^2-5x+4 \n" ); document.write( "
Algebra.Com's Answer #45007 by ankor@dixie-net.com(22740)\"\" \"About 
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I need to graph the folliwing equations. Identify the vertex, intercepts and equation of the axis of symmetry. If a value is irrational , find a decimal approximation.
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\n" ); document.write( "y = x^2 - 5x + 4
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\n" ); document.write( "Make a table of x = -2 to + 6 and find y, the graph should look like this:
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-4%2C+8%2C+-8%2C+8%2C+x%5E2+-+5x+%2B+4%29+\"
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\n" ); document.write( "Find the x intercepts:
\n" ); document.write( "x^2 - 5x + 4 = 0
\n" ); document.write( "Factor:
\n" ); document.write( "(x-4)(x-1) = 0
\n" ); document.write( "x = +4
\n" ); document.write( "x = +1
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\n" ); document.write( "Find the y intercept, this occurs when x = 0
\n" ); document.write( "y = 0^2 -5(0) + 4
\n" ); document.write( "y = 4 is the y intercept
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\n" ); document.write( "Find the axis of symmetry:
\n" ); document.write( "using the form ax^2 + bx + c; axis of sym formula is x = -b/(2a)
\n" ); document.write( "In our equation a = 1; b = -5
\n" ); document.write( "x = -(-5)/(2*1)
\n" ); document.write( "x = +5/2
\n" ); document.write( "x = +2.5 is the axis of symmetry
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\n" ); document.write( "Find the vertex, substitute for x = 2.5 and solve for y
\n" ); document.write( "y = 2.5^2 - 5(2.5) + 4
\n" ); document.write( "y = 6.25 - 12.5 + 4
\n" ); document.write( "y = -2.25
\n" ); document.write( "Vertex occurs at: x = +2.5, y = -2.25
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\n" ); document.write( "you can confirm all this on the graph \n" ); document.write( "
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