when graphing the residential values when do you know if a linear model is an appropriate model for your data

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?