The price elasticity of supply (PES) measures how responsive the quantity supplied of a good is to a change in its price. PES is calculated as the percentage change in quantity supplied divided by the percentage change in price.
In this case, we can calculate PES for each price change:
1. From $1 to $2: PES = ((6 - 4) / 4) / ((2 - 1) / 1) = 0.5
2. From $2 to $3: PES = ((8 - 6) / 6) / ((3 - 2) / 2) = 1
3. From $3 to $4: PES = ((10 - 8) / 8) / ((4 - 3) / 3) = 0.75
The correct statement is, "It is 0.75 when increasing from $3 to $4." This indicates that a 1% increase in price results in a 0.75% increase in quantity supplied, showing a relatively inelastic supply response to changes in price in this price range.