Answer:
Things to remember before doing these problems:
- Domain is how many x values fit the graph and range is how many y values fit the graph.
- All real numbers would be written like (-∞, ∞).
- The vertical line test is used to see if a set of coordinates make up a function (each x value has only one y value).
9: Domain: (0,4) Range: (-3,3)
10: Domain: (-∞, ∞) Range: (-∞, ∞)
11: Domain: All real numbers Range: (-2, ∞)
12: Domain: (-3, 3) Range: (-4,4)
13: Domain: (-∞, ∞) Range: (-2, 4)
14: Domain: (-∞, ∞) Range: (1)
15: Yes, as each input has only one output.
16: No, as -3 has two outputs.
17: No, as -1 has two outputs.
18: No, as 6 has two outputs.
19: Yes, as each x value has one y value.