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The formula of regression analysis C=a+b*D^z The formula of ABZ of regression analysis method based on C D multi group data
In the calculation of logistics, the formula of regression analysis is as follows:
y=a+bx
b=∑xy－n·∑x∑y/[∑x²－n·(∑x)²];
a=∑y－b·∑x/n
The formula of regression linear equation
RELATED INFORMATIONS
- 1. Slope formula of two straight lines Given the angle a between two straight lines and the slope of a straight line, is there a formula for calculating the slope of another straight line?
- 2. What is the formula for calculating the slope of a straight line given the two-point coordinates of the line?
- 3. What's the range of the slope of the line
- 4. The intercept ratio of line L on x-axis and y-axis is 1:3, and it passes through points a (m, m-1) and B (2,3 + m) to find the value of M and the linear equation
- 5. The intersection of y = 2x + m and y = 3x + 3 is in the second quadrant
- 6. In what range of M, the intersection of y = - 2 / 3x-m / 3 and y = 2x + M-1 is in the fourth quadrant?
- 7. If the line y = - 2x-1 intersects with the line y = 3x + m at a point in the third quadrant, what is the value range of M
- 8. When k is the value, the intersection of the line x + 2Y + K + 1 = 0 and 2x + y + 2K = 0 is in the fourth quadrant
- 9. When k=___ The intersection of the line x-2y-2k and the line 2x-3y-k = 0 is on the curve X ^ 2 + y ^ 2 = 9
- 10. English translation It's the cabinet's urgent need to be "full of sorrow, making trouble, traveling for people."
- 11. The line L: y = KX + B, is k the slope of the line?
- 12. The linear equation with a slope of - 4 and an intercept of 7 on the y-axis is______ ．
- 13. According to the following conditions, the equation of a straight line is obtained and transformed into a general formula. The intercept on x-axis and y-axis is 2, - 1 respectively
- 14. The equation of the line with intercept of 4 and - 3 on X and Y axes is______ ．
- 15. The linear equation with a slope of - 2 and an intercept of 3 on the y-axis is () A. 2x+y+3=0B. 2x-y+3=0C. 2x-y-3=0D. 2x+y-3=0
- 16. If f (x) = (- K2 + 3K + 4) x + 2 is an increasing function, then the range of K is
- 17. Given the function f (x) = / x ^ 2-4x-5 /, if in the interval [- 1,5], the image of y = KX + 3K is above the function f (x), the value range of K is obtained
- 18. If y = (1-2k) x-k decreases with the decrease of X, and the image of this function does not pass through the second quadrant, what is the value range of K
- 19. The function y = 2k-3 of 2x, when x is less than 0, y decreases with the increase of X, then the value range of K is
- 20. The function y = (2k + 6) x-k is a first-order function of X, and Y decreases with the increase of X. the value range of K is obtained and the quadrants are pointed out