Using the midpoint method, what would be the price elasticity of demand for orthodontics procedures if the number of procedures fell from 6,000 to 4,000 per week after its price increased from $6,000 to $10,000?

Select one:

a. 0.80

b. 0.45

c. 2.22

d. 1.80

What is the difference between slope and elasticity?

Select one:

a. Slope measures percentage changes, and elasticity measures actual changes.

b. Slope and elasticity both measure actual changes.

c. Slope measures actual changes, and elasticity measures percentage changes.

d. Slope and elasticity both measure percentage changes.