You can use <> instead of ≠, because <> means less than or greater than. For all values of x other than x=2 the function is continuous because the denominator is zero only for x=2, and 0/0 can't be defined. If the function were to be plotted it would be the straight line y=x+3, with a "hole" at x=2. The hole would be located at (2,5).