Function or not a function? justify your answer domain:
range:
(please help)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola