Can anyone please help me with this one ?:)

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

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 !

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16