Answer:
The two options would be k = -10 and k = -7.
Explanation:
Technically k = -5 and k = -1 are possible too, since if you multiply all of the above by -1 as a then all of them will be over -2. Even k = 0 would work, as all numbers multiplied by 0 are 0 and 0 > -2.
Hope this helped!