This is a math problem in Greek, where you are asked to graph the function $y = -3x + 2$ under three different conditions for $x$:

1. a) When $x$ is a real number.
2. β) When $x \geq 0$.
3. γ) When $-2 \leq x \leq 5$.

Would you like me to walk you through how to graph the function for each of these cases or explain anything in more detail?