The average remaining lifetimes for women of various ages in a certain country are given in the following table.+ (A graphing calculator Is recommended.) Average Remaining Lifetimes for Women Age (x) Years (y) 79.6 15 66.0 35 46.5 65 19.9 75 11.5 (a) Find the equation of the least-squares line for the data. (Round all numerical values to two decimal places.) (b) Use the equation from part (a) to estimate the remaining lifetime (in years) of a woman of age 22. (Round your answer to the nearest year.) yr (c) Is the procedure in part (b) an example of interpolation or extrapolation? O interpolation O extrapolation