The question is asking us to write the equation in function notation where c is the independent variable. We have that: 6 c = 2 p - 10; Then: 2 p = 6 c + 10 We will divide both sides of the equation by 2. So it becomes: p = 3 c + 5. In this equation c is the independent variable and p is the dependent variable. It may be also written as: f ( c ) = 3 c + 5 . Answer: The equation is p = 3 c + 5, or : f ( c ) = 3 c + 5.