The idea of **intercept** it is used in the field of **algebra** . The concept refers to the **intersection of a line with the ordinate axis** .

Before moving forward with the definition, we need to review several notions. The **Cartesian coordinates** Are the **straight** which, when crossed perpendicularly, allow **place a point in space or on a plane** .

To **vertical Cartesian coordinate** It is called **tidy** . He **Edge of ordered** , therefore, is the vertical coordinate axis. The **horizontal Cartesian coordinate** Meanwhile, it is called **abscissa** , while the horizontal coordinate axis is the **abscissa shaft** .

The ordinate to the origin, in short, is determined **from the passage of a line through the vertical coordinate axis** (that is, the ordinate axis). Suppose a line crosses the axis **and** (the ordinate axis) at the point **r** (**0, r** ): in this case, the ordinate at the origin of the line is **r** .

It talks about the **pending-ordered form at origin** to refer to a **particular representation of linear equations** , also called **first degree equations** . These **equations** they are equalities formed by subtractions and sums of a variable at the first power.

Its structure is as follows:

**y = sx + t**

It is important to note that **s** and **t** are **real numbers** , being **s** the slope and **t** the ordered to the origin. It can be said that the line intersects the ordinate axis in **(0, t)** .

Knowing the ordinate at the origin, it is simple to find the equation of the line. Keep in mind that, beyond the **position** , the values of **x** they are always equal to **0** on the axis **and** . To the right of the axis **and** they are positive, while on the left they are negative.

In this way, if a line has a slope **5** that intersects the axis **and** on the point **t** **(0, 8)** , your equation will be **y = 5x + 8**