The graph shows a proportional relationship between the number of gallons of gasoline used (g) and the total cost of gasoline (c). Find the unit rate (n). Using the value of r, write an equation in the form of cerg that represents the relationship between the number of gallons of gasoline used (g) and the total cost (c) Taken from SBAC Mathematics Practice Test Scoring Guide Grade 7 p. 31 Deck Drawing Slide e of question, go back to the "Ask Students a Question in the Pear Deck sidebar​