As annalisa is sitting in her bedroom listening to the radio, she notices that it suddenly sounds louder. she looks and is not surprised to find her little sister turning up the volume. how could annalisa tell that the radio became louder before she saw what her sister was doing?

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

answer; /// i believe the correct answer is general act charters;