Equation ex. f(x) = 6 / (x+15)
Domain = x = all areas except where x = 15 (-infinity, -15) u ( -15, +infinity)
Range = y
https://courses.lumenlearning.com/intermediatealgebra/chapter/17-2-1-evaluating-functions/
Khan Academy - https://www.youtube.com/watch?v=O0uUVH8dRiU