This is a great question, but it's also a very broad one. Please find and post one or two actual rational expressions, so we can get started on specifics of how to find vertical and horiz. asymptotes.
In the case of vert. asy.: Set the denom. = to 0 and solve for x. Any real x values that result indicate the location(s) of vertical asymptotes.
Answer:
support: 25%*100 > 10%*50
refute: 25%*50 < 10%*200
Step-by-step explanation:
0.25*100=25 > 0.10*50=5
0.25*50=12.5 < 0.10*200=20
From the table, we can observe that the formula for the total cost of item is

From the data in the table, cost of item 6.00 has the input incorrect because the sum of the cost of its item and tax on the item is,

but the total cost was incorrectly inputed as 7.56.
Hence, the correct option is Option A.