EXPLANATION :
From the problem, we have a linear function :
[tex]y=\frac{1}{2}x-4[/tex]
We need 2 points to graph this function.
when x = 0 :
[tex]\begin{gathered} y=\frac{1}{2}(0)-4 \\ y=-4 \end{gathered}[/tex]
when x = 2
[tex]\begin{gathered} y=\frac{1}{2}(2)-4 \\ y=-3 \end{gathered}[/tex]
Plot the points (0, -4) and (2, -3)
Since the function is a continuous line, the domain and range are all real numbers.
Domain = (-∞, ∞)
Range = (-∞, ∞)
and since the graph is a line with a defined slope, this is a function
