Is this a linear function? one person sends an email to 2 people. those 2 people send it to 4 people, and those 4 send it to 8 people.

Kyle and elijah are planning a road trip to california. their car travels 3/4 of a mile per min. if they did not stop driving, how many miles could kyle and elijah drove in a whole day? ? 1 day = 24 hours. plzzz write a proportion i will give you 100 points

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.

Brad earns $12.75/hr and works 40 hours a week. what is his gross annual income?