Please help asap i will mark branlist please explain how you go the answer

Answer:
I'm so sorry but I don't know this problem. I'm still in middle school so I haven't learned this yet. I wish I could help. ):
Answer:
A
Step-by-step explanation:
[tex]slope=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\\frac{1}{2} =\frac{y-4}{x-0}[/tex]