How can I use Lagrange in this problem?

clc; clear all
format long
A = [-0.5 2.5 6 11 20 28 50 60 80 90];
T =[18 -1 -23 -56 -56 -48 -2 -17 -92 -92];

n= length(A);
AA = 70;
s=0;
for i=1:n
    L=1;
    for j=1:n
        if i~=j
            L=L*(AA-A(j))/(A(i)-A(j));
        end
    end
    s=s+T(i)*L;
end
disp(s);

I tried to solve this problem with lagrange but the answer seems nonsense like -4.277216600057781e+02.

I want to get value of T when A = 70

please help me

[Torsten]

Linear interpolation between 60 and 80 gives a value of (-17-92)/2 = -54.5 at 70.

The A-T behaviour is so bad that it does not make sense to make Lagrange interpolation over the complete A range.