The plot is shown below.The equation of plot is $$\\displaystyle \\Lambda _m = -51286C^3 + 9416.C^2 - 602.5C + 124.1$$When $$\\displaystyle C = 0$$ M$$\\displaystyle \\Lambda _m^0 = -51286(0)^3 + 9416.(0)^2 - 602.5(0) + 124.1$$$$\\displaystyle  \\Lambda _m^0 = 124.1 \\: S \\: cm^2/mol$$Note: For calculating $$\\displaystyle  \\Lambda _m$$, we have used the formula $$\\displaystyle \\Lambda _m = \\dfrac {1000 \\kappa}{C}$$