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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.
xy-graph. y-axis-The vertical axis of a graph, with which the y-values are plotted. y-coordinate-The number which corresponds to the value of y in an ordered pair. y-intercept-The point at which the graph of a line crosses the y-axis. The point at which x = 0.