Question

If the domain is {0, 2, -6}, what is the range of y = -2x + 3?

Answer 1

Visually, what we're looking at is this:
\(\Large \underbrace{\{0,\ 2,\ -6\}}_\text{domain} \overset{y}{\longrightarrow} \underbrace{\{y(0),\ y(2),\ y(-6)\}}_\text{range}\)
Can you tell me what \(y(0),\ y(2)\) and \(y(-6)\) are?