\(a,k=\dfrac{y}{x}=\dfrac{4}{3}\\ b,y=\dfrac{4}{3}x\\ c,x=-12\rightarrow y=\dfrac{4}{3}(-12)=-16\\ x=3\rightarrow y=\dfrac{4}{3}.3=4\)Câu trả lời: \(a,k=\dfrac{y}{x}=\dfrac{4}{3}\\ b,y=\dfrac{4}{3}x\\ c,x=-12\rightarrow y=\dfrac{4}{3}(-12)=-16\\ x=3\rightarrow y=\dfrac{4}{3}.3=4\)