You can calculate approximately a price elasticity of supply by data indicating that: (a) steel production rises 18 % while national income grows 13 %. (b) farmers increase soybean plantings 15 % while prices rise 5 %. (c) Ford raises production when Chevy sales fall since GM raises prices. (d) tennis ball sales slump 8 % while racquet prices jump 12 %.
How can I solve my Economics problem? Please suggest me the correct answer.