Emphasis on A

A market supply curve has three prices - $5.50, $6.00 and $6.50 - with a quantity supplied of 7 tonnes at the price of $5.50, 9 tonnes at $6.00, and 11 tonnes at $6.50. a. Is this supply curve a straight line? This curve is not a straight line because it does not have a constant slope. This curve is a straight line because it has a constant slope of 1. This curve is a straight line because it has a constant slope of 0.5. This curve is a straight line because it has a constant slope of 0.25. b. What is the price elasticity of supply, es, between prices $5.50 and $6.00 and between prices $6.00 and $6.50? Do not round your interim calculations before obtaining the final solution (i.e. do not clear your calculator). In each case, express the number to two decimal places and do not include a positive or negative sign (i.e. 1.67, not -1.7 or +1.667). The price elasticity of supply is [ between prices $5.50 and $6.00, and is between prices $6.00 and $6.50. c. Based on your answers to parts (a) and (b), must a supply curve with a constant slope have a constant numerical elasticity? O A supply curve with a constant slope must have a constant supply elasticity. A supply curve whose slope varies must have a constant supply elasticity. A supply curve whose slope varies has a supply elasticity which varies by exactly the same proportions. A supply curve with a constant slope does not need to have a constant elasticity