Help 4 ​

4.  Here's the first.....the asymptotes  are also shown

https://www.desmos.com/calculator/krknmtrhap

6.       

                 x - 8

        __________               factor the denominator

        x^2 + 5x  - 6

                x  - 8

            __________

            (x + 6) ( x - 1)

The two  values that  make the denominator  = 0  are    x  = -6   and  x  = 1

So.....these are the points of discontinuity  (last answer )