Encuentra la gráfica, el dominio y rango de cada función f(x)= x^2 -1

Autility company burns coal to generate electricity. the cost c(p), (in dollars) of removing p percent of the some stack pollutants is given by c(p)= 85000p/100-p a) find the cost to remove 30% of the pollutant b) find where the function is undefined

What is the range? can’t seem to find it out

Which table shows a proportional relationship between miles traveled and gas used?