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Definition

X-Intercept of a Graph

An xx-intercept of a graph is the exact point where a curve or straight line crosses the horizontal xx-axis. Because every location plotted directly on the xx-axis possesses a yy-coordinate of zero, an xx-intercept is consistently represented by an ordered pair of the form (a,0)(a, 0), where aa denotes the specific xx-value of the crossing. To visually identify an xx-intercept from a graph, one must locate the point where the graphed figure meets the horizontal axis. For instance, if a line passes through the xx-axis at x=4x = 4, its corresponding xx-intercept is recorded as the point (4,0)(4, 0).

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Updated 2026-05-03

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