Emily filled an empty horse trough with water the water level, in centimeter is proportional to time elapsed in imutes since she began filling the trough the graph shows this realshionship a) identify the constand of proportionality
b) identify the unit rate: per
c) explain what (6,21) meand in terms of the graph.
D) what would the water level be after 20 min (hint use proportion)

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.