WILL MARK BRAINIEST please answer wether it’s a function or not. Be sure to JUSTIFY your answer for each one!!

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 i need !

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day