1) Find the functional relationship between y and x, and find the range of independent variables.

Solution: 2*6= 12

Y = 120 \ x (x > 0) Note that the technical transformation does not mean an increase in hourly consumption.

Range of independent variable x (x > 0)

2) It takes more than 24 hours for some new raw materials to enter the factory. What is the control range of X in order to keep the machine running?

Solution: y≥24

∴ 120\x≥24

The solution is x≤5.

So 0 < x ≤ 5

This question is from the evaluation manual, right? I understand everything, believe me ~