Final answer:
The line drawn through the center of the new dilated figure will be parallel to line EF in the original rectangle.
Step-by-step explanation:
The line drawn through the center of the new dilated figure will be parallel to line EF in the original rectangle. This is because dilation is a geometric transformation that preserves parallel lines. Since line EF is a diagonal of the rectangle, it connects opposite corners. When the rectangle is dilated, the new line through the center will still connect opposite corners, resulting in a parallel line to EF.