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# Edexcel D1 - 17th June, 2016 [Exam discussion] Watch

1. (Original post by Midgeymoo17)
Not when my teacher started teaching it on Monday and spent less than 3hrs on it. But under normal conditions yes.
What a joker
2. (Original post by Pablo Picasso)
What a joker
It is not a joke. I suggest you read my earlier post.
3. does anyone have a link to the jan 2016 paper for d1? thanks
4. Can somebody help me with Q8b on june 2014 paper i understand how they worked out the points what i understand is why they had to work out all the points and what they did after working out the points*

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5. (Original post by funkypineapple)
Attachment 551405Hey guys! Could someone tell me why this is wrong? I didn't get enough sleep and somehow think a semi-eulerian works by starting at a even number and ending at odd.
Your picture is not clear enough, but if a graph is semi eulerian and you want to traverse each road once, you need to start at a vertex that has odd valency and end at another vertex with odd valency
6. (Original post by boyyo)
No, its 3y+x, im not 100% sure how though
Alright, thanks. I'm still not sure on the problem as a whole though ;/
7. My gut senses are saying we'll find a trace table in the exam tomorrow.
8. I need some help when doing linear programming and drawing the objective line. For example say the objective line is 3X + Y , why does the objective line cross the y axis at 3 and cross the x axis at 1
9. (Original post by alfmeister)
I need some help when doing linear programming and drawing the objective line. For example say the objective line is 3X + Y , why does the objective line cross the y axis at 3 and cross the x axis at 1
work out the gradient, it will give u Y=-3X, so the gradient is -3. Therefore it crosses Y axis at 3 and x axis at 1
10. (Original post by alfmeister)
I need some help when doing linear programming and drawing the objective line. For example say the objective line is 3X + Y , why does the objective line cross the y axis at 3 and cross the x axis at 1
It doesn't have to. You can equate it to any number that is a factor of both x and y coefficients. SO you could use 15 or 30 to give larger numbers to make the objective line easier to follow. Hope this helps!
11. Hi, could I get some help on all parts of this question please? With some explanation..
12. (Original post by pecora)
My gut senses are saying we'll find a trace table in the exam tomorrow.
Wtf is a trace table?
13. (Original post by nichola_vo)
Hi, could I get some help on all parts of this question please? With some explanation..
Need to know aswell
14. (Original post by theoriginalrpr)
does anyone have a link to the jan 2016 paper for d1? thanks
Looking for it aswell
15. (Original post by Pablo Picasso)
Wtf is a trace table?
Flow chart. Same thing.
16. (Original post by pecora)
Flow chart. Same thing.
Whats a flow chart? Sorry, not good with names
17. (Original post by nichola_vo)
Hi, could I get some help on all parts of this question please? With some explanation..
Right, my attempt.

a) you make comparisons between first and second number on the list and the one which is bigger you "push" to the left and compare the remaining number with the next one. Repeat till the end of the pass and do other passes until you cannot do any more swaps - that's when the list is in order.

b) i) last one — basically what you are doing is "pushing" all the smaller bits to the end
ii) that'll happen when the list is in complete mess, i. e. you need to resort 1, 2, 3, 4 into descending. you will need 3 passes. So n-1 passes.
18. (Original post by Pablo Picasso)
Whats a flow chart? Sorry, not good with names
Chapter 1, I think it's the first or second exercise on it. I'm currently looking at Q7 on page 23, that stuff is tough!
19. (Original post by pecora)
Right, my attempt.

a) you make comparisons between first and second number on the list and the one which is bigger you "push" to the left and compare the remaining number with the next one. Repeat till the end of the pass and do other passes until you cannot do any more swaps - that's when the list is in order.

b) i) last one — basically what you are doing is "pushing" all the smaller bits to the end
ii) that'll happen when the list is in complete mess, i. e. you need to resort 1, 2, 3, 4 into descending. you will need 3 passes. So n-1 passes.
Thank you!! My class group chat is indebted to you - we were wondering about this question
20. (Original post by pecora)
Chapter 1, I think it's the first or second exercise on it. I'm currently looking at Q7 on page 23, that stuff is tough!
Physicsandmathstutor have d1 edexcel topic questions organised and he's got a set of questions on flow charts specifically!!

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