Answer:
I gave my answer in chat and imma try and do this to see if it works with a few words now.
x.x
The answer is the third one
A) L = 5 * W
B) L * W = 320
Substituting A) into B)
B) 5 * W * W = 320
5W^2 = 320
W^2 = 64
Width = 8
Length = 40
We see that the slope intercept is y = 8x - 20. So if we substitute x with 2, because x represents the amount of necklaces sold and we are analyzing her net profit after selling 2 necklaces, that gives us y = 8(2) - 20. Which simplifies to y = -4. So by the time Jocelyn sells 2 necklaces, her net profit will be at -4.