Answer:
36 units²
Step-by-step explanation:
The area of a rhombus is given by half the product of the lengths of the diagonals.
Vertical diagonal AC has length 0 -(-6) = 6 units.
Horizontal diagonal BD has length 5 -(-7) = 12 units.
Then the area is ...
... A = (1/2)(6 units)(12 units) = 36 units²