What is the rate of change and initial value for the linear relation that includes the points shown in the table?

x y
2 3
4 5
6 7
8 9

1. initial value: 1, rate of change: 2
2. initial value: 1, rate of change: 1
3. initial value: 2, rate of change: 2
4. initial value: 3, rate of change: 2

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?