Cereals For many people, breakfast cereal is an important source of fiber in their diets. Cereals also contain potassium, a mineral shown to be associated with maintaining a healthy blood pressure. An analysis of the amount of fiber (in grams) and the potassium content (in milligrams) in servings of 77 breakfast cereals produced the regression model $\widehat{\text { Potassium}}=38+27$ Fiber. If your cereal provides 9 grams of fiber per serving, how much potassium does the model estimate you will get?