Tranlation (movement in x and y direction) would take Angle EGC to Angle GHA.
To go from Angle EGC to Angle GHA, you have to go:
3 units down, and
3 units right
In general, if we have a function f(x):
f(x+a) would be f(x) translated a units left
f(x-a) would be f(x) translated a units right
f(x) + a would be f(x) translated a units up
f(x) - a would be f(x) translated a units down
Since, Angle GHA is 3 units down and 3 units right from Angle EGC, we can say the transformation is:
f(x-3) - 3