Sketch the plots described below and calculate the equations for y(x) from the given information. The plots are all straight lines, Note that the given coordinates refer to abscissa and ordinate values, not x and y value. [The solution of part (a) is given as an example]. 

(b) A semi log of y (logarithmic axis) versus x passes through (1, 2) and (2, 1).

(c) A log plot of y versus x passes through (1, 2) and (2, 1).

(d) A semi log plot of xy (logarithmic axis) versus y/x passes through (1.0, 40, 2) and (2.0, 807, 0).

(e) A log plot of y2/x versus (x – 2) passes through (1.0, 40.2) and (2.0, 807.0).