The annual electricity price of an area is 0.8 yuan and the annual electricity consumption is 100 million kwh. The annual plan is to adjust the electricity price to 0.55-0.75 yuan. According to calculation, if the electricity price is adjusted to X Yuan, the new electricity consumption of this year is y billion kWh and (x-0.4) yuan in inverse proportion, and when x = 0.65, y = 0.8 billion kwh (1) Write the relation between Y and X (2) If the electricity price is not higher than 0.5 yuan, at least how many kilowatt hours of new electricity will be added?
1) Annual electricity consumption: K / (x-0.4)
Annual return: y = K (x-0.3) / (x-0.4), 0.55 ≤ x ≤ 0.75
2) y=0.2a(x-0.3)/(x-0.4)≥0.8a×120%,0.55≤x≤0.75
(x-0.3)≥4.8(x-0.4)
x≤81/190
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