Answer:
30
Step-by-step explanation:
units from (-1,1) to (5,-1) and (-1,-4) to (5,-4) = 6 units
units from (-1,1) to (-1,-4) and (5,-1) to (5,-4) = 5 units
area of rectangle = L X b
= 6 X 5
= 30
answer is c
sorry if incorrect
C