Why might someone choose to use the y intercept in the slope to graph a line

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

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?