freeCodeCamp/guide/chinese/mathematics/x-and-y-intercepts/index.md

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---
title: X and Y Intercepts
localeTitle: X和Y截距
---
## X和Y截距
X截距是X轴上的点其中函数的图形与轴交叉或接触。它们出现在`y = 0` 。
Y截距是函数图与Y轴交叉的点。它发生在`x = 0` 。
一个函数可以有多个X截距但只能有一个Y截距。
要找到X截距s设置`y = 0`并求解x的等式。
要找到Y截距请设置`x = 0`并求解y的等式。
作为示例,已经针对`y = mx + b`形式的典型线解决了X和Y截距。 ![显示以y = mx + b的形式发现典型线的x和y截距的图像。 Y截距等于bX截距等于负b除以m](https://raw.githubusercontent.com/hayleycd/images/master/solve_intercepts.jpeg)