if the origin in a trend equation is shifted backward by three years,x in the equation y=a+bx will be replaced by 1.x+3 2.x-3 3.1/3x 4.none of these
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Answer:
If the origin in a trend equation is shifted backward by three years,x in the equation y=a+bx will be replaced by 1.
Explanation:
From the above question,
They have given :
The origin in a trend equation is shifted backward by three years,x in the equation y=a+bx will be replaced by 1.x+3 2.x-3 3.1/3x 4.
A linear regression line has an equation of the form Y = a + bX, where X is the explanatory variable and Y is the dependent variable. The slope of the line is b, and a is the intercept (the value of y when x = 0).
y = a + bx.
You might recall this as the equation for a line from linear algebra. y = a + bx. • y is the dependent variable. • x is the independent variable.
The least square line of regression of Y on X: This equation is used to estimate value of Y for a given value of X. Y = a + bX Where, a and b are constants The value of constant a and b can be find out with the help of two normal equations.
The two normal equations are as follows:
∑Y = na + b ∑X
∑XY = a ∑X + b ∑ 2
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