In 5th grade coordinate grids go to four quadrants! Please see if you can locate points C and D so that you could create a square by connecting all of the coordinates.

Some hints:

Always start at the origin

Think (left or right, then up or down...plot a point)

Negative numbers on the X axis ask you to move left

Negative numbers on the Y axis ask you to move down

I reached point B by moving right 30 from the origin and then moving down to the -10 on the Y axis. I plotted a point at the intersection of the two line segment found at (30, -10).

Best of luck!