If a cross section is cut parallel to the base of a rectangular prism what shape will it be?

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)

What would the rule be for the reflection of y=-3