K, remember
(ab)/(cd)=(a/c)(b/d) or whatever
also

and

and
![x^ \frac{m}{n}= \sqrt[n]{x^m}](https://tex.z-dn.net/?f=x%5E%20%5Cfrac%7Bm%7D%7Bn%7D%3D%20%5Csqrt%5Bn%5D%7Bx%5Em%7D%20%20)
and

and

and
(a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)
so

=

=

=

=


=

=
19, because a negitive and a negive is a postive so you are going to add them instead of subtract them. Hope i could help :) <3
One positive and one negative
Step-by-step explanation:
It cannot be (4, -3) as there would be 2 outputs (3 and -3) for the input 4, therefore it becomes a one-to-many relationship and not a function.