Which ordered pair would form a proportional relationship with the point graphed below?
V
40
30
20
10
-40-30-20-190
T& 20 30 40 X
(20, -10
-20
-30
-40
(10.-20)
(-30, 20)
(-10.5)
(35.-20)
Please help me ASAP

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?