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| | ==Description== | | ==Description== |
| | *This function gives the slope of the linear regression line through a set of given points. | | *This function gives the slope of the linear regression line through a set of given points. |
| − | *The slope of a regression line (b) represents the rate of change in y as x changes. | + | *The slope of a regression line (b) represents the rate of change in <math> y </math> as ,math> x </math> changes. |
| | *To find a slope we can use the least squares method. | | *To find a slope we can use the least squares method. |
| | *Slope is found by calculating b as the covariance of x and y, divided by the sum of squares (variance) of x. | | *Slope is found by calculating b as the covariance of x and y, divided by the sum of squares (variance) of x. |
| − | *In SLOPE(y,x), y is the array of the numeric dependent values and x is the array of the independent values. | + | *In <math>SLOPE(y,x), y </math> is the array of the numeric dependent values and <math> x </math> is the array of the independent values. |
| | *The arguments can be be either numbers or names, array,constants or references that contain numbers. | | *The arguments can be be either numbers or names, array,constants or references that contain numbers. |
| | *Suppose the array contains text,logical values or empty cells, like that values are not considered. | | *Suppose the array contains text,logical values or empty cells, like that values are not considered. |
| − | *The equation for the slope of the regression line is :<math>b = \frac {\sum (x-\bar{x})(y-\bar{y})} {\sum(x-\bar{x})^2</math>. where <math>\bar{x}</math> and <math>\bar{y}</math> are the sample mean x and y. | + | *The equation for the slope of the regression line is :<math>b = \frac {\sum (x-\bar{x})(y-\bar{y})} {\sum(x-\bar{x})^2}</math>. where <math>\bar{x}</math> and <math>\bar{y}</math> are the sample mean x and y. |
| | *This function will return the result as error when | | *This function will return the result as error when |
| | 1. Any one of the argument is nonnumeric. | | 1. Any one of the argument is nonnumeric. |