As part of a science experiment, a student observes the growth of a population of bacteria in four different media. The table below lists the observations the student made.

Medium Observation

| Population
increases by
10 every hour

|| Population
decreases by
10 every hour

||| Population
increases by
10% every hour

|V Population
decreases by
10% every hour

In which media can the change in the population of bacteria be modeled by a linear function?