Determine whether the table represents a proportional relationship. if a proportional relationship exists, what is the constant ratio of y/x?

a) yes; -2/3
b) yes; -5/3
c) yes; -2/5
d) the table does not represent a proportional relationship

Could someone me with this question i’ve been stuck on it for 20 minutes

Me i’m stuck on all these questions besides the two bottom ones

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet