A market supply curve has three prices $6.50. $7.00 and $7.50 with a quantity supplied of7 tonnes at the price of $6.50. 9 tonnes at $7.00. and 11 tonnes at $7.50. a. Is this supply curve a straight line? 0 This curve is a straight line because it has a constant slope of 0.5. O This curve is a straight line because it has a constant slope of 0.25. O This curve is not a straight line because it does not have a constant slope. O This curve is a straight line because it has a constant slope of'l. b. What is the price elasticity ofsupply. es, between prices $6.50 and $7.00 and setween prices $7.00 and $7.50? 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 (Le. 1.67, not 71.7 or +1667). The price elasticity of supply is between prices $6.50 and $7.00, and is between prices $7.00 and $7.50. 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 whose slope varies has a supply elasticity which varies by exactly the same proportions. O A supply curve with a constant slope must have a constant supply elasticity. O A supply curve whose slope varies must have a constant supply elasticity. O A supply curve with a constant slope does not need to have a constant elasticity