# 1232. Check If It Is a Straight Line

<https://leetcode.com/problems/check-if-it-is-a-straight-line>

## Description

You are given an array `coordinates`, `coordinates[i] = [x, y]`, where `[x, y]` represents the coordinate of a point. Check if these points make a straight line in the XY plane.

**Example 1:**

![](https://assets.leetcode.com/uploads/2019/10/15/untitled-diagram-2.jpg)

```

**Input:** coordinates = [[1,2],[2,3],[3,4],[4,5],[5,6],[6,7]]
**Output:** true
```

**Example 2:**

![](https://assets.leetcode.com/uploads/2019/10/09/untitled-diagram-1.jpg)

```

**Input:** coordinates = [[1,1],[2,2],[3,4],[4,5],[5,6],[7,7]]
**Output:** false
```

**Constraints:**

* `2 <= coordinates.length <= 1000`
* `coordinates[i].length == 2`
* `-10^4 <= coordinates[i][0], coordinates[i][1] <= 10^4`
* `coordinates` contains no duplicate point.

## ac

```java
```
