The answer will be 0.40 because 2 divided by 5 is 0.40
Y=2x
y is the amount of money made from the sold books
x is the number of books that are sold (it is x because you don't know how many will be sold, so you have to account for all possibilities)
2x is because every book is sold for 2 dollars, so that mean x is multiplied by 2 to get y
Answer:
A circle diameter of 26 units is 530.93
I did the math in my head