11.58 Moles et al. (Chemical Engineering Research and Design, 2003) studied how computation times of the stochastic methods are reduced using parallelization (parallel implementation of different global optimization methods).

a Make a scatterplot. Speed-up is measured as percent increase in computation times.
Describe the nature of the relation between speed-up and the number of processors.

b Estimate the relation between speed-up and number of processors using the leastsquares method.
c Does the speed-up increase significantly with the number of processors used? Use .

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Speed-Up (y) No. of Processors (x) 1.00 1.95 2.60 4.30 4.80 12346