Question 151002
{{{f(x)=x^2-4x+3}}}
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a) Domain is all x in ({{{-infinity}}},{{{infinity}}}).

The function has a minimum value at {{{x=2}}} where {{{f(2)=4-6+3=-1}}}.

So the range is ({{{-1}}},{{{infinity}}}).
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b) The function is not even or odd because it is not symmetric about the y axis.
The relations f(x)=f(-x) for even function and f(x)=-f(-x) for an odd function don't make sense here. 
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c) Here is the graph.
{{{ graph( 300, 300, -5, 5, -5, 5, x^2-4x+3) }}}