X-int: x = -1 and x = 2, y-intercept: (0,6)

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?