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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.
The x-and y-intercepts of a graph. The x-intercept of a graph is that value of x where the graph crosses the x-axis. The y-intercept is the value of y where it crosses the y-axis. To find the x-intercept, we have to find the value of x where y = 0 -- because at every point on the x-axis, y = 0.o find the y-intercept of a graph, we must find the value of y when x = 0 -- because at every point on the y-axis, x = 0. But when the equation has the form. y = ax + b,