Respuesta :

2.6 to 1.8 is -.8 (you're going down .8)
1.8 to 3.4 is +1.6 (you're going up 1.6)
3.4 to 2.8 is -.6 (you're going down .6)

Hope I helped. If so, brainliest please. ☺

I know im late but the correct answer is 2.6

Hope this helped!