# Functions

Learn the concept of a function and work with all kinds of them: related, rational, irrational, piece-wise ... Study the general characteristics of the functions and operations between them.

1. ## Cartesian axes and representation of points in the plane

Difficulty: 1

3. ## Computation of images and inverse images

Difficulty: 4

4. ## Concept and equation of a function

Difficulty: 3

5. ## Concept and expression of a real function

Difficulty: 6

6. ## Constant function, Linear function and Affine function

Difficulty: 6

7. ## Domain of a function

Difficulty: 6

8. ## Exponential functions

Difficulty: 7

9. ## Functions defined by parts

Difficulty: 8

10. ## Functions: Graphic representation

Difficulty: 3

11. ## Graph of a function

Difficulty: 4

12. ## Graphic determination of the domain and of the image

Difficulty: 4

13. ## Image of a function

Difficulty: 6

14. ## Irrational functions

Difficulty: 7

15. ## Logarithmic functions

Difficulty: 7

17. ## Polynomial functions: constant, affine and quadratic

Difficulty: 5

18. ## Rational functions

Difficulty: 7

19. ## The absolute value function

Difficulty: 8