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More specifically, 1  an x-intercept is a point in the equation where the y-value is zero, and. 2  a y-intercept is a point in the equation where the x-value is zero.  Find the x- and y-intercepts of 25x2 + 4y2 = 9.
Y-Intercept of A Line. The Y-Intercept of a line is the point where a line's graph intersects (crosses) the Y-axis. 1  A y-intercept of 3 means that a line's graph intersects the Y-axis at the point (0,3).  A y-intercept of -4 means that the graph of a line crosses the Y-axis at the point (0,-4).