Which relation is a function?

a. {(1, 2): (1.3); (3, 2): (4. 2)}

b. {(1, 2): (2, 3); (3. 4): (2,5)}

c. {(1,2): (2. 3): (3. 4): (1.5)}

d. {(1.2): (2.5): (3. 2): 14. 5}}

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?