Difference between revisions of "X-intercept"
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BRichtigen (talk | contribs) (not a point, just a coordinate & point-slope form) |
BRichtigen (talk | contribs) (add pic) |
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The '''x-intercept''' is the x-coordinate of the point at which a [[line]] intersects the [[x-axis]]. If the line is represented in the point-slope form, i.e., <math> y = m \cdot x +b</math> and <math>m \neq 0</math>, then the ''x-intercept'' is <math>-b/m</math>. if <math> m = 0</math>, the line doesn't cross the x-axis (case <math>b \neq 0</math>) - so there is no intersection, or the line is identical to the x-axis (case <math>b = 0</math>). | The '''x-intercept''' is the x-coordinate of the point at which a [[line]] intersects the [[x-axis]]. If the line is represented in the point-slope form, i.e., <math> y = m \cdot x +b</math> and <math>m \neq 0</math>, then the ''x-intercept'' is <math>-b/m</math>. if <math> m = 0</math>, the line doesn't cross the x-axis (case <math>b \neq 0</math>) - so there is no intersection, or the line is identical to the x-axis (case <math>b = 0</math>). | ||
Revision as of 20:59, December 20, 2008
The x-intercept is the x-coordinate of the point at which a line intersects the x-axis. If the line is represented in the point-slope form, i.e., and , then the x-intercept is . if , the line doesn't cross the x-axis (case ) - so there is no intersection, or the line is identical to the x-axis (case ).
See also: y-intercept