Question

Suppose we have a linear equation relating y and x defined by

3y + 9x = 18,
where x is an independent variable and y is a dependent variable. Which of the following is a correct function notation
representation of y?
Select the correct answer below:

Answer 1

(a) f(x) = -3x +6

Explanation:

Solve for y, then write as a function.

3y +9x = 18 . . . . . . given

y +3x = 6 . . . . . . . . divide by 3

y = -3x +6 . . . . . . . subtract 3x

f(x) = -3x +6 . . . . . written using function notation