CCLS - Math: 7.RP.2.c

Ratios And Proportional Relationships
Analyze Proportional Relationships And Use Them To Solve Real-World And Mathematical Problems.
State Standard:
Represent proportional relationships by equations. For example, if total cost t is proportional to the number n of items purchased at a constant price p, the relationship between the total cost and the number of items can be expressed as t = pn.