an they given graph f(x) is a polynomial model in pico math superhero flying around right in equation in terms of the parent function f(x) with each transformation

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

Can some one me with these questions