Mathematics

To find where a line crosses the $x$-axis, remember that every point on the $x$-axis has a $y$-coordinate of zero. So set $y = 0$ and solve for $x$ — this gives you the exact location where the line touches the horizontal axis. It's the opposite process from finding the $y$-intercept, where you'd set $x = 0$ instead.

To find where a line crosses the $x$-axis, remember that every point on the $x$-axis has a $y$-coordinate of zero. So set $y = 0$ and solve for $x$ — this gives you the exact location where the line touches the horizontal axis. It's the opposite process from finding the $y$-intercept, where you'd set $x = 0$ instead.