How to use the INTERCEPT function
The INTERCEPT function returns a value representing the y-value where a line intersects the y-axis. The line is calculated using the method of least squares based on known x- and y-values.
Use the INTERCEPT function when you want to build a linear regression line based on this straight line equation y = mx + c. c is where the line cuts the y-axis, m is the slope of the line and can be calculated using the SLOPE function.
Formula in cell E3:
Excel Function Syntax
INTERCEPT(known_y's, known_x's)
Arguments
known_y's | Required. An array or cell reference to dependent data points. |
known_x's | Required. An array or cell reference to independent data points. |
Comments
Zero values are included but text, logical values and empty cells are ignored.
The SLOPE function returns
- #N/A! error if there are a different number of values in known_y's and known_x's.
Equation for the INTERCEPT function:
Equation for b:
The following chart demonstrates the x- and y-values used in the top image and where the fitted line intersects the y-axis which also corresponds to the value calculated by the INTERCEPT function.
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