Need help answering this question. I don't fully understand how to plan the points on the graph line.

Answer:
[tex]\text{a. Solution:}\\\{x\ |\ x\text{ is greater than }\dfrac{5}{2}\}\\\text{OR}\\\{x\ |\ x > \dfrac{5}{2}\}[/tex]
[tex]\text{b. (Shown in the image)}[/tex]