Answer:
The median is 6 
Explanation:
What is median? 
Median is simply the middle number in a data set (in terms of value) 
To find the median we list the numbers in order from greatest to least and then go to the middle number
Given data set: 4 6 9 8 3 7 4 2 18
Data set in order from greatest to least: 2 3 4 4 6 7 8 9 18 
We then go the middle number which is 6 
The median is 6