Someone give the answer for the following, we need to write an expression for the following

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.

Write the equation in logarithmic form 8^x=64

The function f(x)= x5+ ( x + 3)2 is used to create a table. if x = -1 then what is f(x)?