Need help ASAP if y’all can help me out thank you when give you s heart :)

How do you determine whether a relationship represented as as graph is linear or nonlinear

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

When is g(x) = 0 for the function g(x) = 5.23x + 4?