6. Select all of the possible types of numbers that are appropriate input values for the given situation. A flower delivery service charges \( \$ 39.95 \) per flower arrangement and \( \$ 2.99 \) for delivery. The total cost \( y \) is represented by the function \( y = 39.95 x + 2.99 \) , where \( x \) is the number of flower arrangements.
x integers ,positive numbers,only zero
y rational numbers,positive numbers