# 斜率本文重定向自 斜率

## 定义

${\displaystyle K={\frac {\Delta y}{\Delta x}}}$　(${\displaystyle \Delta }$变量的改变)

${\displaystyle K={\frac {y_{2}-y_{1}}{x_{2}-x_{1}}}}$

## 运算

### 点斜式

${\displaystyle y-y_{0}=k\left(x-x_{0}\right)}$

### 截距式

${\displaystyle {\frac {x}{a}}+{\frac {y}{b}}=1}$

### 两点式

②若${\displaystyle x_{1}=x_{2}}$${\displaystyle x=x_{1}}$

### 斜截式

${\displaystyle y=kx+b}$

${\displaystyle x}$截距为${\displaystyle a}$${\displaystyle y=k(x-a)}$
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