# What graphs are functions?

**What graphs are functions?**In

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**Graphs** of **functions** are **graphs** of equations that have been solved for y! The **graph** of f(x) in this example is the **graph** of y = x^{2} – 3. It is easy to generate points on the **graph**. Choose a value for the first coordinate, then evaluate f at that number to find the second coordinate.

Then, what types of graphs are functions?

**Different types of graphs** depend on **the type** of **function** that is graphed. The eight most commonly used **graphs** are linear, power, quadratic, polynomial, rational, exponential, logarithmic, and sinusoidal. Each has a unique **graph** that is easy to visually differentiate from the rest.

Beside above, can points on a graph be a function? A **graph** (or set of **points**) in the plane is a **FUNCTION** if no vertical line contains more than one of its **points**.

Subsequently, one may also ask, what is the function of graphs and charts?

Line **graphs** are usually used to show dependent data, and particularly trends over time. Line **graphs** depict a point value for each category, which are joined in a line. We can use the data from the pie **chart** as a line **graph** too.

How can you identify a function?

If all possible vertical lines will only cross the relation in one place, then the relation is a **function**. This works because if a vertical line crosses a relation in more than one place it means that there must be two y values corresponding to one x value in that relation.

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