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    I've noticed equations in both my normal maths (edexcel, non-calculator tomorrow) and my further maths (aqa) past papers and revision with f(x) in somewhere and even though we've gone over it several times in the lessons I don't understand it or remember how to solve it. Could someone explain ot to me please?
    I'll include a picture of the question I got stuck on today, ignore my wrong answers.Name:  image.jpg
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    (Original post by IfYouCanDreamIt)
    I've noticed equations in both my normal maths (edexcel, non-calculator tomorrow) and my further maths (aqa) past papers and revision with f(x) in somewhere and even though we've gone over it several times in the lessons I don't understand it or remember how to solve it. Could someone explain ot to me please?
    I'll include a picture of the question I got stuck on today, ignore my wrong answers.Name:  image.jpg
Views: 160
Size:  504.0 KB
    The second question answer is 2

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    (Original post by IfYouCanDreamIt)
    I've noticed equations in both my normal maths (edexcel, non-calculator tomorrow) and my further maths (aqa) past papers and revision with f(x) in somewhere and even though we've gone over it several times in the lessons I don't understand it or remember how to solve it. Could someone explain ot to me please?
    I'll include a picture of the question I got stuck on today, ignore my wrong answers.Name:  image.jpg
Views: 160
Size:  504.0 KB
    You basically divide where it meets the x values which is -4 divide by 4 Which is -1, then the next x value is 4 so you divide it by 4 which is 1 then the difference between then is 2

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    (Original post by IfYouCanDreamIt)
    I've noticed equations in both my normal maths (edexcel, non-calculator tomorrow) and my further maths (aqa) past papers and revision with f(x) in somewhere and even though we've gone over it several times in the lessons I don't understand it or remember how to solve it. Could someone explain ot to me please?
    I'll include a picture of the question I got stuck on today, ignore my wrong answers.Name:  image.jpg
Views: 160
Size:  504.0 KB
    f(ax) --> squashes graph parallel to the x axis by scale factor 1/a
    so both of the points that cross the x axis are multiplied by 1/4 (eg the point which crosses the x axis at (4,0) will become (1,0))
    then work out the distance between the 2 new points
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    (Original post by Monsor)
    You basically divide where it meets the x values which is -4 divide by 4 Which is -1, then the next x value is 4 so you divide it by 4 which is 1 then the difference between then is 2

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    (Original post by surina16)
    f(ax) --> squashes graph parallel to the x axis by scale factor 1/a
    so both of the points that cross the x axis are multiplied by 1/4 (eg the point which crosses the x axis at (4,0) will become (1,0))
    then work out the distance between the 2 new points
    Thankyou, I've realised that I meant to write (0,1) for the first one rather than (1,0), I just had a blonde moment.
    The second question makes sense now, I undestand where I went wrong, I multiplied each of the points by four rather than dividing, so thankyou
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    (Original post by IfYouCanDreamIt)
    Thankyou, I've realised that I meant to write (0,1) for the first one rather than (1,0), I just had a blonde moment.
    The second question makes sense now, I undestand where I went wrong, I multiplied each of the points by four rather than dividing, so thankyou
    no problem, good luck in tomorrow's exam! hoping the exam doesn't contain any 'controversial' questions...
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    (Original post by IfYouCanDreamIt)
    Thankyou, I've realised that I meant to write (0,1) for the first one rather than (1,0), I just had a blonde moment.
    The second question makes sense now, I undestand where I went wrong, I multiplied each of the points by four rather than dividing, so thankyou
    You're welcome, best of luck tomorrow aim for that a*

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