The given function is expressed as
[tex]\begin{gathered} y\text{ = -}\frac{1}{2}x\text{ + 2} \\ \text{We would substitute x = 4 into the given function. It becomes} \\ y\text{ = - }\frac{1}{2}\times\text{ 4 + 2} \\ y\text{ = - 2 + 2} \\ y\text{ = 0} \end{gathered}[/tex]
At x = 4, y = 0
Thus, the graph crosses the x axis at x = 4
