如图所示,直线L1与L2相交于点P,L1的函数表达式式为y=2x+3,点P的横坐标为-1,且L2交y轴于点A(0,-1),求直线L2的函数解析式.
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![如图所示,直线L1与L2相交于点P,L1的函数表达式式为y=2x+3,点P的横坐标为-1,且L2交y轴于点A(0,-1),求直线L2的函数解析式.](/uploads/image/z/6856697-65-7.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%9B%B4%E7%BA%BFL1%E4%B8%8EL2%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9P%2CL1%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%E5%BC%8F%E4%B8%BAy%3D2x%2B3%2C%E7%82%B9P%E7%9A%84%E6%A8%AA%E5%9D%90%E6%A0%87%E4%B8%BA-1%2C%E4%B8%94L2%E4%BA%A4y%E8%BD%B4%E4%BA%8E%E7%82%B9A%EF%BC%880%2C-1%EF%BC%89%2C%E6%B1%82%E7%9B%B4%E7%BA%BFL2%E7%9A%84%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F.)
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