Please can someone solve this question

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

Which of the following can be used to explain a statement in a geometric proof?

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83