y=kx+b过A(0,1)和B(a,-3a)(a

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y=kx+b过A(0,1)和B(a,-3a)(a

y=kx+b过A(0,1)和B(a,-3a)(a
y=kx+b过A(0,1)和B(a,-3a)(a

y=kx+b过A(0,1)和B(a,-3a)(a
一次函数y=kx+b的图象经过点A(0,1)和点B(a,-3a)(a