Below are the Common Core State Standards that most closely relate to the following lesson.
Baseball Economics 201 ~ http://www.econedlink.org/e908
Grades: 6-8, 9-12
Mathematics - Grade 6 - Ratios & Proportional Relationships
6.RP.A - Understand ratio concepts and use ratio reasoning to solve problems.
Mathematics - Grade 7 - Ratios & Proportional Relationships
7.RP.A - Analyze proportional relationships and use them to solve real-world and mathematical problems.
Standards for Mathematical Practice
MP1 - Make sense of problems and persevere in solving them.
MP3 - Construct viable arguments and critique the reasoning of others.
MP6 - Attend to precision.