The list price for a dress was $84 and the sale price was $63.find the percent of discount

25%

Step-by-step explanation:

This takes a bit of work but You take your listing price (84) and your discount price(63) and find out how much difference(84-63) there is, in this case there is 21. then you take 84 and multiply it by a percent that you think is reasonable. In this case I started with .15 percent. Finally I got to 25% and I took the number that it made and checked to see if it was the 21 that was the difference of the other two numbers (which it was).

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.