WILL GIVE BRAINLIEST

[10 points, algebra 2]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.

Which table represents a linear function? i'll give brainliest to first answer ^'^