16.
Answer:
The coordinates of the image points are;

Step-by-step explanation:
We want to find the coordinates of the image of given shape after 90 degree counterclockwise rotation.
The rule for 90 degree counterclockwise rotation about the origin can be written as;

Firstly, let us write out the coordinates of the preimage points;

We can now apply the rule to determine the coordinates of the image points;

Therefore, the coordinates of the image points are;
