D. made this film at the end of yesterday’s tutorial. He chose 4 equations that summed up what he had learned during the hour’s lesson. I am indebted to M.F. who originally noticed the easy trick for plotting lines which have a fractional gradient.

D. made this film at the end of yesterday’s tutorial. He chose 4 equations that summed up what he had learned during the hour’s lesson. I am indebted to M.F. who originally noticed the easy trick for plotting lines which have a fractional gradient.

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