Drew is scuba diving. The graph below models the amount of air remaining in his oxygen tank (y) over time (x)

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

idk

step-by-step explanation:

the height of the surface increases from the center out to the sides of the road

it is c!