Fabregas04

05-02-2010, 07:41 PM

Ive worked out how to do parts a,b and c but i dont understand why the graph for fx(x) at x=3 goes down from 4 to 3 then back to 4,why isnt it a straight line from at x=3 to x=4 like shown at x=0 and x=1,help much appreciated