Hey,
I know you already got the answer but I just wanted to provide a quick explanation/summary so you really let it sink in. :)
m= slope , b = y-intercept
y = mx+b
y = (1) x + 3/5
y = x+3/5
* There's no need to write the 1. :)
So your answer, as you said, would be b!
Hope this helped summarize things! :)
----------------------------
DISCLAIMER: I am not a professional tutor or have any professional background in your subject. Please do not copy my work down, as that will only make things harder for you in the long run. Take the time to really understand this, and it'll make future problems easier. I am human, and may make mistakes, despite my best efforts. Again, I possess no professional background in your subject, so anything you do with my help will be your responsibility. Thank you for reading this, and have a wonderful day/night!