Answer:
B ... 4
C ... 2
D ... 1
Explanation:
Given are 3 linear equations as
B). -3x + 3y = 7 
 
C). 7x − y = 21 
 
D). 3x − 5y = -20
We have to find x and y intercept
We can make these equations of the form 

Then we know that a is x intercept and b is y intercept.
B) 

Hence intercepts are 
4. (-7/3, 0) and (0, 7/3) 
C) 7x − y = 21

2. (3, 0) and (0, -21)
D) 

1. (-20/3, 0) and (0, 4)