Respuesta :
they lose 4 yds on each of 3 plays......3 * -4 = -12
then they complete a 9 yd pass.....+ 9
-12 + 9 = -3 <== their change in yardage
then they complete a 9 yd pass.....+ 9
-12 + 9 = -3 <== their change in yardage