1. tan(x) . . . . 3rd choice
2. False . . . it is a graph of sin(x)-3
3. Of the choices offered, the best is sin(x +45°), the 2nd selection. It actually looks like a graph of sin(x +60°).
4. True . . . . it matches the graph of Question 1 shifted up 2 units
5. Probably True. The graph is of the given equation. The wording of the question leaves doubt. (It is a "graph", not an "equation." If the question is taken literally, the answer is False.)
6. 2cos(x) . . . . . the 4th choice
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I wish some of these curriculum materials would be scrutinized by a good editor. It is hard to learn much from defective teaching material. Good luck.