Is this function linear or nonlinear? y=1/x

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?