SYSTEMS OF EQUATIONS

https://www.youtube.com/watch?v=h9q5rLcW73Y

https://www.youtube.com/watch?v=IBsJAFUpV2c

https://www.youtube.com/watch?v=hIYhtq8e8jA

FIRST DEGREE EQUATIONS

https://www.youtube.com/watch?v=nHW48vVl2RU

https://www.youtube.com/watch?v=KyTyx6xAKrA

QUADRATIC EQUATIONS

 https://www.youtube.com/watch?v=zmL12JP8_pM&t=1s

SYSTEMS OF EQUATIONS

http://www.edu.xunta.gal/centros/iescastroalobrevilagarcia/system/files/Ejercicios%20de%20sistemas%20de%20ecuaciones.pdf

PROBLEMS I

https://matematiquescepa.files.wordpress.com/2013/12/problemas-de-sistemas-de-ecuaciones-de-1c2ba-grado-2c2ba-eso1.pdf

PROBLEMS II

https://www.matematicasonline.es/segundoeso/ejercicios/problemas-grado1-con-sol.pdf

NOTES

https://www.matematicasonline.es/cidead/2esomatematicas/2quincena11/index2_11.htm

INTRODUCTION

https://www.youtube.com/watch?v=dwUh87BjW0E

WHAT IS NOT A FUNCTION? 

https://www.youtube.com/watch?v=ezMspkMqTCA&t=35s

FUNCTION DOMAIN AND RANGE 

https://www.youtube.com/watch?v=m1EnnlaJ7Pc

FUNCTION DOMAIN, RANGE AND SIGN

https://www.youtube.com/watch?v=PPuWf2cDEKc

FUNCTION CONTINUITY

https://www.youtube.com/watch?v=pISTZuqZ8iI

FUNCTION X,Y INTERCEPTS

https://www.youtube.com/watch?v=E1sMAfxnT7c

COORDINATES

https://www.matematicasonline.es/almacen/2eso/fichas%202eso_sant/pdf_13-Funciones-2.html

https://matematicasiesoja.files.wordpress.com/2013/10/funciones-2c2ba-eso.pdf

FUNCTIONS´  CHARACTERISTICS

https://www.matematicasonline.es/segundoeso/repaso2/funiones-propiedades.html

FREQUENCY TABLES

https://www.youtube.com/watch?v=Agd4Am950Fc

COMMON GRAPHS IN STATISTICS

https://www.youtube.com/watch?v=3M6qBgnH1pc

CENTRALIZATION MEASURES

https://www.youtube.com/watch?v=leotQ32xZQ0

STATISTICAL DISPERSION

https://www.youtube.com/watch?v=5K95vEQzWS8

GENERAL ACTIVITIES

https://www.vitutor.com/estadistica/descriptiva/b_6.html