They have sold ten full cases
but have sold 10 and a half cases in total
The answer is b good luck!!!
The fifth term of the sequence is -15
<h3>Recursive functions</h3>
Given the following recursive functions

For the second term:
a2 = a1 - 7
a2 = 13 - 7
a2 = 6
For the third term:
a3 = a2 - 7
a3 = 6 - 7
a3 = -1
For the fourth term:
a4 = a3 - 7
a4 = -1 - 7
a4 = -8
For the fifth term:
a5 = a4 - 7
a5 = -8 - 7
a5 = -15
Hence the fifth term of the sequence is -15
Learn more on recursive function here: brainly.com/question/489759
The answer is C. 1/3 represents the slope and -3 represents the y intercept.