미지시료의 농도 값을 구해야 하는데 잘 안되네요
농도값        흡광도
0.1             0.288
0.2             0.478  
0.4             0.832
0.6             1.138
0.8             1.417
미지시료 
A                1.998
B                0.513

으로 나왔는데 그래프 그리고 미지시료의 농도를 구하면 되는데 x축에 농도로 두고 y축에 흡광도로 해서 값을 구하려니 잘 안되네요. 방법 좀 알려 주실 수있나요?