In January a small pizza shop received a 350 boxes of margherita pizza and 200 boxes of cheese from its supplier. They sold each box of margherita pizza at R30 and a box of cheese at R35.The following month(February)pizza prices increased to R42 for margherita and R49 for cheese. In the same month the supplier increased the number of boxes supplied from 350 to 441 boxes for margherita and 200 to 252 boxes for cheese. 1.How is the slope of the supply curve?​