Because we don't have any set numbers for x or y, I believe that the solution set for both equations are infinite.
C or d i think is the correct answer
Answer: 12/5
Step-by-step explanation:

Answer:
csc(θ) = 1.1662
cos(θ) = 0.5145
Step-by-step explanation:
I attach the image of your question in the picture below
We know the values of the adjacent and opposite cathetus
tan(θ) = Opposite / Adjacent
tan(θ) = 5/3 = 1.666
θ = tan^-1 (5/3)
θ = 59.0362 °
Now that we have the angle, we can easily find the value of the expressions needed
csc(θ) = 1 / sin(θ) = 1/ (0.85749) = 1.1662
cos(θ) = 0.5145
There is no rate of change.
x=8 and x=13 are horizontal lines going to infinity and negative infinity, its valid for all reals on those 2 lines.
I'm guessing you left out some information on what kind of interpretation you want of these straight lines.