1. Which one is an identity function?

2. A. Constant

3. A. Common logarithmic

4. A. Constant

5. f(x) is an odd function if and only if:

6. If y is an image of x under the function f, we denote it by:

7. Let f(x) = cos x, then f(x) is an:

8. x^2 + y^2 = 4 is:

9. If y = f(x), then the variable x is called --------- variable of a function f.

10. If the degree of a polynomial function is ------------, then it is called a linear function: