Which equation represents a proportional relationship? all the answers i put are fractions. this is 7th grade mathematics

A y=1/2x
b y=1/2x+1
c y=1/2x+2
d y=1/2x+1/2

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

Which statements regarding efg are true? check all that apply.

How does reflecting or rotating a figure change the interior angles of the figure?