1/3
2/6 - 1
3/9 - 2
4/12 - 3
5/15 - 4
The first is proportional the second is proportional and the third is not proportional
Answer:

Step-by-step explanation:
We have been given the following expression;
-13/√x
In order to rationalize the denominator, we multiply the numerator and the denominator by √x;

X Is a number so ( x +12) a