EXPLANATION.
In exercise 22 you can see two different equations for two parallel lines, where a translation of two units is made at the point x towards the vertical axis at y.
By giving values to x in the equation starting with x equal to zero we obtain the first point in negative y.
Here we see a reflection at y -2 for y equal to 2 positive at y.
The equation in g is a reflection of the equation in f, we can examine the other points, they correspond exactly to the same.
NOTE:
The second equation shows us clearly how many units the points of the equation f transfer, 3 units are transferred from each point.
