Image 1: the demand curve is elastic. Image 2: demand curve is Inelastic. Image 3: The demand curve is unitary
In Image 1: the demand curve is elastic because a small change in price from 6 to 8 leads to greater change quantity demanded from 20 to 40 quantity
In Image 2: demand curve is Inelastic because a greater change in price leads to smaller change in quantity demanded
in Image 3: The demand curve is unitary because a change in price leads to an equal change in quantity demanded