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最佳答案:两点式:y/(x-5)=(y+3)/x点斜式:y/(x-5)=(0+3)/(5-0)斜截式:y=(0+3)x/(5-0)-3=3x/5-3截距式:x/5-y/3
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最佳答案:(1) y/(-3-0)=(x-5)/(0-5)(2)k=3/5y=(3/5)(x-5)(3) y=(3/5)x-3(4) 3x-5y-15=0