# Lesson 1

> Relation - any pairing of a set of inputs with a set of outputs

> Domain - set of inputs

> Range - set of outputs

### Ordered Pairs

### Table

### Graph

### Mapping

### Equation

### (1, 2)

### (-2, 4)

### (0, -3)

| x | y |
| --- | --- |
| 1 | 2 |
| -2 | 4 |
| 0 | -3 |

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202511_NZD1dJ3yoNv5QcqXyM?q=75&s=1280x180&t=outside&f=webp)

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202512_1yQdNOM3C84Z1Mupzq?q=75&s=1280x180&t=outside&f=webp)

mapping shows how each item in the domain is paired with an element in the range.

### x=2y

> Independent Variable - Domain/Input

> Dependent Variable - Range/output

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202512_Cx7hXN7Yak6xwqG7Ui?q=75&s=1280x180&t=outside&f=webp)

## same thing

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202514_jjMlk3emDZRdhn9J1f)

> Discrete Function - Specific values in D&R

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202515_S6Dc9pTw9cbOva7z4r?q=75&s=1280x180&t=outside&f=webp)

> Continuous Function - Every value between

![Image](https://upload.cafenono.com/image/slashpageHome/20240227/202516_GrD8D3n1U96xl0l4Xg?q=75&s=1280x180&t=outside&f=webp)

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