Fernando put $1 in his piggy bank. For the next 3 weeks Fernando doubled the amount he put in his bank.

(1,1), (2, ), (3, ), (4, )

Do these points present a linear or nonlinear function?

Jaylem buys ONE meatball sub every week from his favorite restaurant for $8.

(1,8), (2, ), (3, ), (4, )

Do these points present a linear or nonlinear function?

Kawther bought an ant farm for her birthday and it came with 20 ants. The population of ants triples every month.

(1, ), (2, ), (3, ), (4, )

Do these points present a linear or nonlinear function?

Zeba joined a fitness class. She paid a one time $50 fee in the first month to join and then has to pay $25 every month for membership.

(1,75), ( , ), ( , ), ( , )

Do these points present a linear or nonlinear function?