o Loans made and intended to be sold by the originating lender or creditor to FNMA, GNMA, or FHLMC (or its successor); 7 or o Loans that are the subject of a home equity conversion mortgage or reverse mortgage issued by a lender or creditor subject to the regulation. 4
1 Draw the max line -- the one with as large a slope as you think reasonable (taking into account error bars), while still doing a fair job of representing all the data. Measure the slope of this line.  Calculate the uncertainty in the slope as one-half of the difference between max and min slopes.
Solving this equation for y, which is the unknown value at x, gives. which is the formula for linear interpolation in the interval ( x 0 , x 1 ) {\displaystyle (x_{0},x_{1})} . Outside this interval, the formula is identical to linear extrapolation. This formula can also be understood as a weighted average.