The cost to rent skis at a local sporting goods store is $15 plus $20 per day. which equation models the relationship between the total cost to rent, c, and the length of the rental in days, d?

let

> the length of the rental in days

> the total cost to rent

we know that

the equation that models the relationship between 'c' and 'd' is the equation of the line equal to

therefore

the answer is

The equation that will best express the given statement is c = 15 + 20d. this is because it was stated that the cost (c) is 15 dollars plus (+) 20 per day (20d). as to describing the relationship we could say that cost is directly proportional to number of days time 20 dollars and an additional of 15 dollars.