If the two known points are given by the coordinates (x0,y0) and (x1,y1), the linear interpolant is the straight line between these points. For a given x, you can find the interpolated value y, by using y = y0 + (x-x0)*((y1-y0)/(x1-x0)). Given (x0,y0), (x1,y1), and x, return y (rounded to two decimal places).