Two thirds of rice is grown in Asia. China, Bangladesh, Thailand, Indonesia, Cambodia, India, Myanmar, Pakistan, Korea, Japan, Vietnam and the Phillipines all account for 87% of the worlds total rice production.
To calculate the slope, the formula is (y1-y2)/(x1-x2) , which in this case, the answer would be:

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Mechanised agriculture is the process of using agricultural machinery to mechanise the work of agriculture, greatly increasing farm worker productivity
The pennines was the backbone of England. Also called pennines hill.