MATLAB

Which of the following about curve fitting in MATLAB is WRONG? Consider x = linspace(0,4*pi,10); p polyfit(x,y, 3); y-sin(x); The function polyfit fits a 3rd-degree polynomial to the points. The following code shows an example of curve fitting. x-0:5; y- [0,20,60,68,77 , 1101: plot (x , y, 'o'); axis ( [-1,7,-20 , 12 ); Linear regression finds the slope and intercept of the besting fitting line. The polyfit function is used to get the best fit by minimizing the sum of the squares of the deviations of the calculated values from the data