Which function has a constant additive rate of change of –1/4?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Anyone know? will mark brainliest if correct

Which of the following is the correct ratio for converting kilograms to grams