A businesswoman needs to fly to Bulgaria for a conference. She watches the prices for flights and records the prices each Monday on the graph below.
The x-axis (horizontal) shows the number of weeks leading up to the flight. Therefore, if x = 5, it means that the flight is in 5 weeks. If x = 10, the flight is in ten weeks, and so on.
Which of the following is closest to how cheap the flight can be during any point in time?

Question

A businesswoman needs to fly to Bulgaria for a conference. She watches the prices for flights and records the prices each Monday on the graph below.
 The x-axis (horizontal) shows the number of weeks leading up to the flight. Therefore, if x = 5, it means that the flight is in 5 weeks. If x = 10, the flight is in ten weeks, and so on.
Which of the following is closest to how cheap the flight can be during any point in time?

Quizplus · Accepted Answer

We can see from the graph that the price dips below $500. From this we can tell that both $1400 and $500 are too high. After the line dips below $500, it seems to level off. It looks as if there is very little chance the price will go as low as $200. $400 is a good approximation for the cheapest value of the flight.

A Businesswoman Needs to Fly to Bulgaria for a Conference