Answer :
The equation representing the cost of the ride is R = $5 + $0.45dd.
What is flat fee?
The flat fee charged is the fixed cost. This cost remains constant regardless of the distance travelled. The additional fee is the variable cost. It increases with the distance travelled.
Derivation of the equation that represents cost of the ride.
Total cost = fixed cost + (variable cost x miles driven)
R = $5 + $0.45dd
To learn more about flat fees, please check: https://brainly.com/question/25879561