The monthly payment for a home loan is given by a function f(p,r,n)f(p,r,n) where pp is the principal (the initial size of the l
oan), rr the interest rate, and nn the length of the loan in months. interest rates are expressed as a decimal: a % interest rate is denoted by r=0.09r=0.09. if p=100000,r=0.09p=100000,r=0.09, and n=216n=216(a 18-year loan), then the monthly payment is f(100000,0.09,216)=816f(100000,0.09,216)=816. furthermore, with these values we have
