If you run a linear model, you get one price coefficient that represents the change in utility per change in currency unit. With ACBC, we report the endpoints since these are easier to use for most simulations, importance calculations, etc.
If you need the slope of that line, simply divide the change in utility by the change in price to get the utility per currency unit.
For instance, if ACBC returned $10=2.39 and $30=-2.39, then we can compute the utility change per dollar as (2.39-(-2.39))/(10-30) = 4.78/-20 = -0.239u/$. In other words, each $1 increase in price reduces the utility by 0.239 utility points.