Which table represents y as a function of x

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

What are the domain and range of the function below? a) domain: (-4,0) range: [-2,infinity) b) domain: (-3,0) range: [-2,infinity) c) domain: (-infinity, infinity) range: [-2, infinity) d) domain: [-2,infinity) range: (-infinity, infinity)