Question

Rewrite y + 3 = 0 using function notation.

A) f(x) = 3
B) f(x) = -3
C) f(x) + 3 = 0
D) f(x) = y + 3

Answer 1

B)
`\displaystyle f(x) = -3`

Explanation:

`\displaystyle y ← f(x) \\ \\ y + 3 = 0; y = -3 \\ \\ f(x) = -3`

Answer 2

f(x) basically just substitutes the "y"
so you would bring everything over to one side
y + 3 = 0
subtract 3
y = -3
then
f(x) = -3

That is B)