Answer:
8. yes; 18
9. no
10. no
11. yes; -9
Step-by-step explanation:
The equation for inverse variation is y = k/x. The constant k will be the product of x and y: k = xy.
8.
Products are (-3)(-6) = (2)(9) = (4.5)(4) = 18.
Inverse variation with k = 18.
9.
Products are ...
(5)(4) ≠ (10)(8).
Not inverse variation.
10.
Products are ...
(2)(25) ≠ (2.5)(16).
Not inverse variation.
11.
Products are (3)(-3) = (9)(-1) = (12)(-.75) = -9.
Inverse variation with k = -9.
