How to calculate the percentage decrease in third year. i want extra detailed working

Which system of linear inequalities is represented by the graph?

Match each inequality to the number line that represents its solution

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.