In the case of limited arable land, how to ensure China's food security Some measures to be taken

In the case of limited arable land, how to ensure China's food security Some measures to be taken

1. In order to ensure the quantity and quality of cultivated land, and increase investment, to ensure the red line of 1.8 billion mu. 2, strengthen the control of land desertification and desertification. 3, promote agricultural modernization with agricultural mechanization, accelerate the construction of agricultural mechanization. 4, pay close attention to the construction of small and medium-sized farmland water conservancy. 5, establish and improve the important agricultural science and technology system of grain production

The cultivated land area of Dongfeng Village is 10 ∧ 9 square meters. The per capita cultivated land area y of this village changes with the number x of this village, in which the constant is - and the variable is——

10^9/x=y
y=10^9/x
Constant: 10 ^ 9
Variables: X and Y

Cultivated land area is 10 times 6 square meters, occupied cultivated land area y changes with the number of people n, how to write the independent variable expression function?

Y = 10 divided by N, the total amount is so much, less people get more, more people get less