If by function form you're referencing a y= equation then this is how you do it.
You want the y variable to be alone on its own side, so our first step is to subtract that ugly 5x from the left side.
That gives you -y=-5x-1
Now, we never want the y to be negative so we fix this by multiplying both sides by negative one which will cancel out that negative.
We are then left with y=5x+1
