# The price of discount airline ticket starts at $150 and increases by $30 each week. Which algebraic expression models this situation?

##### 2 Answers

So we start at

So we have

So our equation is

#### Explanation:

Since the airline ticket begins at

But the ticket increases by

The **second** week it would be:

The **third** week it would be:

The **fourth** week it would be:

So you can see a pattern. Every week you multiply **week** that it is. We can write this fact algebraically by saying:

where