Answer:
77%
Step-by-step explanation:

The given equation is :
now, here
1. constant of proportionality for this direct variation is :
2. for the given table :
3. the given equation in slope intercept form will be :
where, slope (m) = -3 and y - intercept (b) = 0
4. graph is attached in attachment ~
So you have boxes of 10. A case holds 200. So you can take 20*10 = 200
20 boxes of markers are in one case
A=gb/c bc you subtract and i’m just trying to help
The answer is B for the first one, and C for the second.
Let me know if you need an explanation.
Hope this helps!