So you can use
$21.95 + $.19x = $18.95 + $.21x
The answer is the second image from left to right (B). Examples of direct and inverse variations are showed in the image below. :)
Answer:

Step-by-step explanation:
we know that
1 kg=1,000 g
so
using proportion
Find out how many kilograms are 69 grams
Let
x -----> the weight in kg
