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- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
- int main(int argc, char *argv[])
- {
- int n, i,j;
- float x[50], y[50], sumX=0, sumX2=0, sumY=0, sumXY=0, a, b;
- printf("How many data points?\n");
- scanf("%d", &n);
- printf("Enter data:\n");
- for(i=1;i<=n;i++)
- {
- printf("x[%d]=",i);
- scanf("%f", &x[i]);
- printf("y[%d]=",i);
- scanf("%f", &y[i]);
- }
- for(i=1;i<=n;i++)
- {
- sumX = sumX + x[i];
- sumX2 = sumX2 + x[i]*x[i];
- sumY = sumY + y[i];
- sumXY = sumXY + x[i]*y[i];
- }
- b = (n*sumXY-sumX*sumY)/(n*sumX2-sumX*sumX);
- a = (sumY - b*sumX)/n;
- printf("Value is: a=%f and \n",a);
- /*printf("\nEquation of best fit is: y = %f + %fx\n",a,b);*/
- return 0;
- }
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