HELP ASAP OPTIONS ON THE IMAGE Which representations show a direct variation? (i think its 3 and another one but pls verify)

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

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

Astore has apples on sale for three dollars or 2 pounds how many pounds of apples can you buy for nine dollars if an apple is approximately 5 ounces how many apples can you buy for nine dollars