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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 point where the graph of a function crosses the x-axis or y-axis. y-intercept. The point where the graph crosses the y-axis. In a linear equation of the form y=mx+b. The y-intercept is the constant b. constant of proportionality. The constant ratio between two quantities. EX: 1/4, 2/8, 3/26.