1x Trapezoid QRST is dilated by a scale factor of 3.4 to create trapezoid Q'R'S'T'. The perimeter of trapezoid QRST is y units.
What is the perimeter in units of trapezoid Q'R'S'T'?
Since the scale factor is 3.4, all the side lengths of trapezoid QRST will be multiplied by 3.4 to get the corresponding side lengths of trapezoid Q'R'S'T'.
The perimeter of a trapezoid is the sum of all its side lengths. Since all the side lengths of trapezoid QRST are multiplied by 3.4, the perimeter of trapezoid Q'R'S'T' will be 3.4 times the perimeter of trapezoid QRST.
Therefore, the perimeter of trapezoid Q'R'S'T' is 3.4y units.