Rational Function's Graph

I have a function : f(x)= (6x-4)/(3^2+ 10x -8)
I have to find vertical asymtote, horizon asymtote, and hole

then I did like this 2(x-3) / ((x+4)(3x-2))

so the verical asymtote should be x=-4 and x=2/3

but when I graph on calculator, x=2/3 doesn't appear on that.... It's a error

but It's not a hole, because it's not a factor of both demoniator and numerator...

SO. what is the vertical asymtote??