The function rule t–4, 6(x, y) could be used to describe which translation?
a parallelogram on a coordinate plane that is translated 4 units down and 6 units to the right
a trapezoid on a coordinate plane that is translated 4 units to the left and 6 units up
a rhombus on a coordinate plane that is translated 4 units down and 6 units to the left
a rectangle on a coordinate plane that is translated 4 units to the right and 6 units up

Any translation , 

is a rule (or a function rule) which takes the x coordinate of a point a units right of x, if a is positive, 

and |a| units left of x, if x is negative.

Similarly y is taken b units up, if b is positive, and b units down, if |b| is negative.

Another possible notation of  is T(x, y) →(x+a, y+b).

The function rule  shifts any point (x, y) 4 units left, and 6 units up.

thus, this rule can be used to describe:

a trapezoid on a coordinate plane that is translated (shifted) 4 units to the left and 6 units up.