Join TSR now and get all your revision questions answeredSign up now

C1 (AS LEVEL/SOLOMON PAPER) Graph question Watch

    • Thread Starter
    Offline

    5
    ReputationRep:
    Greetings,

    I am revising for my maths exam at the moment and I struggle with what seems a simple graph question. The problem is that I don't understand why the graph consists of some connected straight lines and how to complete what is asked from me. I uploaded 2 pictures of the question, thanks indeed for help.
    Attached Images
      
    Offline

    2
    ReputationRep:
    Basically for part a) you need to draw y=1 with the graph and y=-x with the graph.
    The number of solutions will be the number of intersection with the graph.

    For part b) you will need to apply transformations to the graph separately.
    • Thread Starter
    Offline

    5
    ReputationRep:
    (Original post by Tynos)
    Basically for part a) you need to draw y=1 with the graph and y=-x with the graph.
    The number of solutions will be the number of intersection with the graph.

    For part b) you will need to apply transformations to the graph separately.
    y=1 intersects with the graph only once, however, in marking guide it is said that there are 3 solutions.

    For part b what do you mean by transformation to the graph separately? I don't remember ever sketching something like this at lessons.
    Offline

    0
    ReputationRep:
    Y=1 intersects three times, its a horizontal line at 1

    Posted from TSR Mobile
    • Thread Starter
    Offline

    5
    ReputationRep:
    (Original post by HiImArt)
    Y=1 intersects three times, its a horizontal line at 1

    Posted from TSR Mobile
    How does it intersect three times if it only crosses the y-axis once at 1? Sorry if my question seems stupid but I really have no clue and I want to fix that before exams.

    Offline

    2
    ReputationRep:
    (Original post by Blackfyre)
    y=1 intersects with the graph only once, however, in marking guide it is said that there are 3 solutions.

    For part b what do you mean by transformation to the graph separately? I don't remember ever sketching something like this at lessons.
    Ok go to 1 on the y axis, draw a straight line through it and see how many intersections you get.

    You will have to learn the transformations, eg. inside the bracket affects the x axis outside the bracket affects the y axis.

    Therefore y=f(x-2) Is a translation of 2 units in the positive direction.

    y=f(2x) Is a Squash in the x axis of scale factor 1/2
 
 
 
Poll
Which web browser do you use?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.