Question

Line L is NOT a function. The equation of line L could be A) x + 3 = 0. B) y + 3 = 0. C) y + 3x = 0. D) x + 3y = 0.

Answer 1

None of the above.

Explanation:

All of these are functions. For each input of x, there is only one output of y. Therefore, they are all functions.

Answer 2

x+3=0

Explanation:

x + 3 = 0 is correct, since it is a vertical line passing through all points of the form (-3, y)