It's a linear function: y = mx + b.
The graph of the linear function is a straight line. Two points are enough for plotting a graph of this function.
The domain of this function is
[tex]D=[0,\ \infty)[/tex]
We have the function: y= 3x - 6
We choose any two x and calculate the value of y:
for x = 0 → y = 3(0) - 6 = 0 - 6 = -6 → (0, -6)
for x = 2 → y = 3(2) - 6 = 6 - 6 = 0 → (2, 0)
