Answer based on context:

In week 9, the Lions visited their divisional rival, the Green Bay Packers, on Monday Night Football. The Lions took an early lead on their opening drive of the first quarter, which they kept the rest of the game, via a 25-yard touchdown pass from Matthew Stafford to Marvin Jones Jr. The Lions extended their lead in the second quarter via a four-yard touchdown run from Ameer Abdullah. The Packers responded with a 35-yard field goal from Mason Crosby, to make the score 14-3 in favor of Detroit at half-time. The Lions opened the scoring in the second-half via a 44-yard field goal from Matt Prater in the third quarter. The Lions scored 13 points in the fourth quarter via a 19-yard field goal from Prater, an 11-yard touchdown pass from Stafford to Jones, and a 31-yard field goal from Prater. The Packers scored 14 points in the fourth quarter via a one-yard touchdown run from Brett Hundley, and a one-yard touchdown run from Jamaal Williams as time expired, making the final score 30-17 in favor of Detroit, snapping their three-game losing streak. After 23 consecutive road losses against the Packers between 1992 and 2014, the Lions have now won two of the last three meetings in Green Bay. Matthew Stafford recorded his 200th career touchdown in the first quarter of the game, becoming the fourth quarterback in NFL history to do so before turning 30 years old, a list also occupied by Brett Favre, Dan Marino, and Peyton Manning. The game also marked the first time the Lions did not punt in a game since Thanksgiving Day in 1971.

How many yards long was the average length across all touchdown plays?
8.4