Answer:
To answer your question one may write in slope-intercept form to help answer your question:
Step-by-step explanation:
Slope-intercept form is the following:
[tex]y=mx+b[/tex]
Then rearranging your question into that format:
[tex]2y=x+9\\y=\frac{x+9}2[/tex]
Then we know that produces a line:
The ordered pair [tex](0,4.5)\ \text{or}\ (0,\frac{9}2)[/tex]