http://docs.google.com/viewer?a=v&q=cache:joxr_MNqu4MJ:www.mast.queensu.ca/~math121/AssignmentSolutions/sol_01_s01_1_qa.pdf+The+demand+function+for+a+certain+product+q%3DD(p),+is+linear,+where+p+is+the+price+per+item+in+dollars+and+q+is+the+quantity+demanded.+if+p+increases+by+%245+market+research+shows+the+q+drops+by+two+items+.+In+addition+,+100+items+are+purchased+if+the+price+is+%24550.+a)+find+a+formula+for+I)+q+as+a+linear+function+of+p+ii)+p+as+a+linear+function+of+q&hl=en&gl=us&pid=bl&srcid=ADGEESjFxz8UjC548FTzgBneYTdAwz-W3bVe-nMzwJMvkAUSVFWGUDXJ-Cf40jR7XJCAZjlYjtcUja8Vz6MzhLUzsRixomRLRhXSRZfOr1isRM7ypckyYHYrkDGCJq5ANRGIsQMOI0Od&sig=AHIEtbTou0dOppV-aijVoUGltqTImcfJVw