Answer to Question #303301 in Discrete Mathematics for John

Question

For the following relation, write an equation that describes the connection between x (the first component in an ordered pair) and y (the second component in an ordered pair).

a. {(1, 1), (1, -1), (4, 2), (4, -2), (9, 3), (9, -3)}

b. {(1, 4), (2, 3), (3, 2), (4, 1), (-2, -3), (6, -1), (7, -2)}

Answer 1

a.

$$|y|=\sqrt{x}$$

b.

$$y=\begin{cases} -x+5&x\not=-2 \\ -3 &x=-2 \end{cases}$$