Question 99952
x/2-y=7   Yes, this is a linear equation.  If you were to graph this line, the graph will be a straight line.
Re-writen as y=(1/2)x-7
Graphing:
{{{ graph( 300, 200, -6, 25, -10, 10, (1/2)x-7) }}} 
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G(X)=2/X-3 No, this is not a linear equation.  If you were to graph this line, it would not be a straight line
Graphing:
{{{ graph( 300, 200, -6, 5, -10, 10, 2/x-3) }}} 
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X=3+y Yes, this is a linear equation.  If you were to graph this line, the graph will be a straight line.
Re-write as y=x-3
{{{ graph( 300, 200, -6, 5, -10, 10, x-3) }}} 
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f(x)=7 Yes, this is a linear equation.  If you were to graph this line, the graph will be a straight line.
Graphing:
{{{ graph( 300, 200, -6, 5, -10, 10, 7) }}}