According to the bar graph, which attribute is under investigation?
a) the height of students.
b) the height of teachers.
c) the number of students in class.
d) the heights of students and teachers.

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?