You should explain whether a situation is linear or not. for instance, i have 2 scenarios below. which one is linear and how do you know?

situation a: my cell phone charges me $100 to register and then $0.10 per minute. how much will i be charged for 55 minutes?

situation b: bacteria double every day. if a bacteria culture has 5 organisms on the first day, how many bacteria will there be on day 10?

b. x + 1

step-by-step explanation:

i'am smart

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)