How to rotate a point counter clockwise 90 degrees

The video tutorial explains how to rotate a point on a coordinate grid by 90 degrees counterclockwise. It introduces the concept of using a fixed point at the origin and demonstrates the process of swapping coordinates and making the Y coordinate negative. The tutorial provides a visual example to help understand the new position of the rotated point.

What is the process to rotate a point 90 degrees counterclockwise around the origin?

What is the significance of swapping the variables during the rotation process?

What happens to the Y coordinate when you rotate a point 90 degrees counterclockwise?

How do you find the new coordinates of a point after a 90-degree rotation?

Can you describe the transformation of the point Q (-4, 1) after a 90-degree rotation?