Determine whether each relation is a function. 1. {(3, -8), (3, 2), (6, -1), (2, 2)}
2. {(0, 1), (-4, -3), (-3, 6), (3, 6)}
3. {(-6, 3), (2, -2), (0, 8), (1, 1)}
4. {(1, 8), (-6, 21), (-11, 21), (-3, 11), (0, 21)}

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?