（1）画出函数Y=2x-1的图像（2）判断点A（-2.5,﹣4）,B（1,3),(2.5,4)是否在函数Y=2X-1的图像上?
（1）画出函数Y=2x-1的图像（2）判断点A（-2.5,﹣4）,B（1,3),(2.5,4)是否在函数Y=2X-1的图像上?
数学人气：605 ℃时间：2019-12-10 01:44:08
优质解答
（1）画出x,y轴,令x=0,所以,y=-1,得点（0,-1）,令y=0,得x=1/2,得点（1/2,0）,连接这两点并延伸,即为函数y=2x-1的图像（2）将三点的x值代入上式函数,看得到的y值是不是对应点的y值,若是,则该点在函数图像上,若否,则不...
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