Does this graph represent a function? Why or why not?

The ratio of blue cards to green cards is 2 to 5. there are 8 blue cards. complete the diagram and explain how you can find the number of green cards.

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax

Dawn is selling her mp3 player for 3 4 of the original price. the original price for the mp3 player was $40. how much is she selling her mp3 player for?