Answer:
slope
Step-by-step explanation:
Unit rate is the rate that y changes (increase would be positive, decrease would be negative) per change in x. The change in y is called the Rise and the change in x the Run.
Rise/Run = Slope
y=mx+b, where m is the slope. Ib b = 0, we'd have y=mx. If m = 2, it means that y will increase by 2 every time x is increased by 1.