For which function is it true that y →- ∞ as x →∞

This is not a function because we have an A with many B. It is like saying f (x) = 2 or 4 It fails the "Vertical Line Test" and so is not a function. But is still a valid relationship, so don't get angry with it. It CAN (possibly) have a B with many A. For example sine, cosine, etc are like that. Perfectly valid functions.

y = -√(x - 6)

Step-by-step explanation:

The fist choice on the left

y = -√(x - 6)

The larger x gets

the more negative y becomes

5+2x=a

asdasdsaadsaddsasds