Enter a Y (for Yes) or an N (for No) in each answer space below to indicate whether the corresponding function is one-to-one or not.
You must get all of the answers correct to receive credit.
1. $k(t) = 8 \sqrt t + 5$
2. $f(x) = \sin { x }, \quad 0 \le x \le \pi$
3. $h(t) = 3 t^2 + 7, \quad t \le 0$
4. $h(x) = |x| + 3$
5. $g(t) = 3 t^2 + 7$
6. $k(x) = \cos { x }, \quad 0 \le x \le \pi$