This is a MATLAB user-defined-funciton question. I have been at this for hours.

CREATE FUNCTION FOR AIR DENSITY USING LINEAR INTERPOLATION Create a function that, given the altitude of the parachutist, will return the air density found by linearly interpolating between the data from the table below (i.e. given one altitude at a time, return the linearly interpolated density value for that altitude). If you have data values d1 and d2 at two points x1 and x2, respectively, then the estimated d at a point x between x1 and x2 is given by (x-x1) d = d1 + (d2-d1) * TABLE 1: RELATION BETWEEN ALTITUDE AND DENSITY Altitude, m Density, kg/m3 0 610 1219 1829 2438 3048 3658 4267 1.290 1.216 1.146 1.078 1.014 0.952 0.894 0.839