Quantity of good How can you tell without computing elasticities which ones are elastic, which are inelastic and which exhibit unit elasticity? Well, for linear functions, whether elasticity of supply is greater than / equal to/ less than 1 corresponds with which axis it crosses. So, we know B and E will be unit elastic since they cross the origin. A and D will be elastic since they cross the vertical axis. And C and F will be inelastic since they cross the horizontal axis