can someone pls answer this feel free to not answer it like example just type YFYDKDTLUDLT and get some points!

Which of the following lists of ordered pairs is a function?

Explain briefly why it's to choose a chord progression before developing the harmony.

How did brunelleschi solve his problem with the dome of the florence cathedral? a. he created an outer support shell. b. he created many layers of support within the dome. c. he created external supports for the dome. d. all of the above