# How do I graph a cost function like #C(x) = 3x + 20,000#?

##### 1 Answer

Jun 21, 2015

I think that your function can be used to model a service (say a health insurance) where you pay a fixed value (20,000) to join the program and 3 for each medical visit.

#### Explanation:

Your function is a linear function and is represented, graphically, by a **straight line**.

Considering an example you can immagine that it represents a medical insurance.

You pay

For example:

...etc.

You can now plot these points on your graph.

So, graphically you have: