What is the theoretical probability of a bulb to be switched on?

Write the following as a base and exponent

Witch represents the inverse of the function f(x)=1/4x-12

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.