What are some expressions equivalent to 12x + 4?

What is the y intercept of f(x)=(1/2)^x?

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

Do, h = (7, 9) (14, 18) the scale factor is