英语的啊 大概是高一的水平就可以了If the graph of the f function is a line with slope 2 ,which of the following could be the equation of 五个选项(A) f(x)=4x-2(B)f(x)=2x+4(C)f(x)=-2x-2(D)f(x)=(1/2)x+2(E)f(x)=(-1/2)x+1/2
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