What is the x-intercept ? Definition and Examples.

The x-intercept is the x-coordinate of a point where a line intersects with the x-axis.

The green line on the left crosses the x-axis at (-6, 0) while the one on the right crosses the x-axis at (4, 0)

For the point (-6,0), -6 is the x-intercept.

For the point (4,0), 4 is the x-intercept.

Notice that the x-intercept is always located on the x-axis.

Notice also that the y-coordinate is always equal to zero when a point is located on the x-axis.

Be careful sign!

The x-intercept is not technically the point of intersection between the line and the x-axis. It is the x-value or x-coordinate of that point of intersection.

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