When we apply an affine transformation like a stretch, we are really transforming the whole plane, not just a small section of a grid. Because the transformation is uniform, we should be able to describe the image of any point algebraically.

If we think of point P as being at the origin on the Cartesian plane, then what happens to point R, for example, with coordinates (1, 4) ?

What happens to a point with coordinates (x, y) ?

Can you find a transformation matrix for the stretch?

The end

a high-res pdf file of this new GEOaa-zz task