200x - y + 500= 0

Put it in Y=mx + b form

Step-by-step explanation:

1. Put y on the other side -  200x + 500 = y

y= 200x +500

See, this works because -y, when bringing it to another side, you would be adding it. That cancels out the negative, giving you your slope-intercept form. All you have to do is flip it into y=mx + b form, and that's how you get y=200x + 500