Learning Objectives:

__Math Tutoring on Linear Equations in Two Variable and the Coordinate Plane and Plotting Points__

In this lesson, we will be discussing **Ordered Pairs** and **Plotting Points.** We now begin looking at the relationships between two **variables**. Typically one **variable** is considered to be the **input**, and the other is called the **output**. The **Input** is the value that is considered first, and the **Output** is the value corresponding to or is matched with the input. The **input/output** designation may represent a **cause/effect** relationship, but that is not always the case. But because of this, we sometimes say that the **input** controls the **output** or that the **output** depends on the **input**. Whenever we have values that represent the **input/output** relationship, we can organize them and it is called an **Ordered Pair**, where for an **ordered pair** we have the **input** value comma, the corresponding **output** value in a set of parentheses.

To **graph **or** plot points** we use two perpendicular number lines called **Axes**. The **Horizontal** number line is called the **x-axis**, and we have the positive **x** values on the right and the negative **x **values on the left. The **Vertical** number line is called the **y-axis**, and the positive **y** values above the **x-axis** and the negative **y** values are below the **x-axis**. The **point** at which the axes cross is called the **Origin**, and every **point** on the **coordinate plane** is identified by what is called an **Ordered Pair.**

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**Hook Questions**:

*1. **What is meant by ordered pair?*

*2. **What is the difference between x and y axes?*

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