I suppose that would just be when the numerator of the rational expression equals zero. Nothing special goes on with the graph in that case; there are simply x-intercepts at those values of x.
<span>Discontinuities are created when the denominator of the rational expression equals zero (because division by zero is undefined). Graphically, this is usually represented by a dashed vertical line indicating a vertical asymptote. </span>
This is your perfect answer
Step-by-step explanation:
y-x=4
There could be two possibilities,
1) y = 4+x
2) y-4 = x
