how can i found the best linear function representing the following points ???

x=[ 0 0.6 1.2 1.8 2.4 2.8 ]

f(x)=[ 1.1 2.5 4.9 6.4 9.3 14.1 ]

Answer 1

[Star Strider]

Try this:

x=[ 0 0.6 1.2 1.8 2.4 2.8 ]
fx=[ 1.1 2.5 4.9 6.4 9.3 14.1 ]

B = [x(:) ones(size(x(:)))] \ fx(:);            % Estimate Parameters
Slope = B(1)
Intercept = B(2)

FitLine = [x(:) ones(size(x(:)))] * B;

figure
plot(x, fx, 'p')
hold on
plot(x, FitLine, '-r')
hold off
grid

A linear fit may not be entirely appropriate, becausse there is an obvious trend in the residuals.

.

[ammar emad]

OMG . man i really appreciate it and thank you so mush for helping me....

[Star Strider]

As always, my pleasure!