2.1

Question 1

A function passes the

Answer 1

vertical line test

Question 2

Explain this- every x has a unique output

Answer 2

f(-1) and f(1) both equaling 1 still satisfies the unique output, since the f(-1) does not equal 1 and another number and because f(1) does not equal 1 and another number

Question 3

(fg) (0)

Answer 3

f(0) x g(0)

Question 4

In bracket notation, infinities are always surrounded by

Answer 4

parentheses

Question 5

x^2