43. This graph shows a proportional relationship between the number of gallons of gasoline used (g) and the total cost of gasoline (c).Find the
constant of proportionality (r). Using the value for r, write an equation in the
form of c = rg that represents the relationship between the number of
gallons of gasoline used (g) and the total cost (c).*
(A) $3.00 per gallon
(B) $3.13 per gallon
(C) $3.23 per gallon
(D) $3.33 per gallon