Removing which point from the coordinate plane would make the graph a function of x?

A(-4,3)
B(-2, 1)
C(0,4)
D(1,1)

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?