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  1. #include <stdio.h>
  2. #include <math.h>
  3. #define N 10
  4.  
  5. int main()
  6. {
  7.  double x[N],y[N];
  8.  double Sx=0.0,Sy=0.0,Sxy=0.0,Sx2=0.0;
  9.  double m, b;
  10.  int i;
  11.  
  12.  x[0]=-1.0; y[0]=0.0;
  13.   x[1]=2.0; y[1]=2.0;
  14.    x[2]=6.0; y[2]=7.0;
  15.     x[3]=4.0;  y[3]=5.0;
  16.      x[4]=5.0;  y[4]=3.0;
  17.       x[5]=-3.0;  y[5]=-2.0;
  18.        x[6]=1.0;  y[6]=2.0;
  19.         x[7]=-5.0;  y[7]=-4.0;
  20.          x[8]=-10.0;  y[8]=-4.0;
  21.           x[9]=-8.0;  y[9]=-6.0;
  22.  
  23.        for(i=0;i<N;i++)
  24.         {
  25.         Sx += x[i];
  26.         Sy += y[i];
  27.         Sxy += (x[i]*y[i]);
  28.         Sx2 += pow(x[i],2.0);
  29.        }
  30. printf("Sx = %lf\n",Sx);
  31. printf("Sy = %lf\n",Sy);
  32. printf("Sxy = %lf\n",Sxy);
  33. printf("Sx2 = %lf\n",Sx2);
  34.  
  35. m =(N*Sxy - Sx*Sy)/(N*Sx2 - pow(Sx,2.0));
  36. printf("m = %lf\n",m);
  37.  
  38. b =(Sy - m*(Sx))/(double)N;
  39. printf("b = %lf\n",b);
  40.  printf("La ecuacion de la recta es : y = %1fx %+1f\n",m,b);
  41. }
  42.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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Sx = -9.000000
Sy = 3.000000
Sxy = 197.000000
Sx2 = 281.000000
m = 0.731770
b = 0.958593
La ecuacion de la recta es : y = 0.731770x +0.958593
https://ideone.com/MIm7VB
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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