2.3 & 2.4 Key Features of Functions And Graphing

 

How might we analyse a function?

Now that we know something about the basics of functions, this section aims to help deepen your understanding of them and enable you to identify key features such as vertex points, intercepts with axes and asymptotes. You will also learn about the difference between drawing and sketching a graph, alongside finding points were graphs intersect. 

Key Concepts

In this unit you should learn to…

  • Identify the key features of graphs, such as its vertices, asymptotes, y-intercepts and zeroes. Specifically for quadratics, this may also include the axis of symmetry. 

  • Know how to draw a graph and sketch a graph. 

  • Know how to solve equations based on graphing both sides and finding the point of intersection.

Essentials

The following is a series of videos that will help you understand, learn about and review this sub-topic.

1. Key Features of Graphs  

This video looks at the most significant features of graphs.

2. Key Features: Exam Questions

A few exam style questions based on finding key features of graphs. 

3. Drawing Graphs

What does it mean to "Draw a graph" and how does one achieve maximum marks in an exam. 

4. Sketching Graphs

What's the difference between drawing and sketching a graph? 

5. Intersection points of Curves

This quick video looks at solving equations graphically, which essentially boils down to finding points of intersection.

Summary

Test yourself

Self Checking Quiz

Practice your understanding on these quiz questions. Check your answers when you are done and read the worked solutions when you get stuck. If you find there are still some gaps in your understanding then go back to the videos and above.

 

Exam Style Questions

The following questions are based on IB exam style questions from past exams. You should print these off (from the document at the top) and try to do these questions under exam conditions. Then you can check your work with the video solution.

Question 1

Video solution

Question 2

Video solution

Question 3

Video solution

MY PROGRESS

How much of 2.3 & 2.4 Key Features of Functions And Graphing have you understood?