If i get it wrong i have to start over : (

18 square units

Step-by-step explanation:

To find the area of a rectangle, we just need the length and height.

3 vertices of a rectangle are given, which is enough here to figure out the length (x-axis distance) and the height (y-axis distance).

From (0,0) origin to (3,0) would be 3 - 0 = 3 units in the x-axis. That is length:

Length = 3 units

Now, a point is given (0,6), that is in the y-axis. This is from origin. So, the height is:

6 - 0 = 6 units

Height = 6

Now, the area would be:

Area = Length * Height

Area = 3 * 6

Area = 18 square units