the output pins are not effected by serial reading

[system]

so, what should i do?
if the data printed in serial monitor in this form
-0.24
-0.25
-0.3
-0.3
-0.25
-0.24
-0.23
-0.23
-0.32
-0.37
-0.4
-0.65
-0.93
-1.21
-2.94
-4.8
-5.24