Exam 1 Graphs & Relations Answers

[millstone]

can someone please explain why 7 is C?

[Odette]

Can someone explain to me how it can't be E?

Oh i know... :shock:...surprisingly I know something :shock:
You need to use the formula y=m * x^3 + c  => m= rise/run= 1/3
Therefore you get y= (1/3)x^3, making C the correct answer
Using the points in Option C (1, 1/3), you get the right answer ...
If you want me to explain it further just let me know

[Mystery]

Can someone explain to me how it can't be E?

Oh i know... :shock:...surprisingly I know something :shock:
You need to use the formula y=m * x^3 + c  => m= rise/run= 1/3
Therefore you get y= (1/3)x^3, making C the correct answer

Correct and then you test the points from the answers, making (1, (1/3)) correct which is C.

So the correct answers are:

Graphs and Relations

   1. D
   2. C
   3. E
   4. B
   5. D
   6. E
   7. C
   8. B
   9. A

[kjg]

Can someone explain to me how it can't be E?

Oh i know... :shock:...surprisingly I know something :shock:
You need to use the formula y=m * x^3 + c  => m= rise/run= 1/3
Therefore you get y= (1/3)x^3, making C the correct answer

Correct and then you test the points from the answers, making (1, (1/3)) correct which is C.

So the correct answers are:

Graphs and Relations

   1. D
   2. C
   3. E
   4. B
   5. D
   6. E
   7. C
   8. B
   9. A

ohhh, i hope i quoted this thingy right haha

ok, graphs and realtions, q6) E?
why E? wouldn't it be B?
I stuffed up question 7 haha, woopsie, i didn't see that the x axis had already been transformed

did anyone find this years exams so much harder than expected
i cried afterwards

[Odette]

It's E because he needs to make AT LEAST twice as many bottles of RED wine (x) as white wine (y)
Therefore its x>/= 2y

Ok ok im going now people, adios =]

[Lyonzy]

I find its sometimes easier to consider them equal before thinking about the inequality, for example:
"This year he plans to make twice as many bottles of red as white"
and then its easier to see that r=2w (or x=2y)
...or you could also do a diagram, and check you've got twice as much red as white.

[gangreen]

Oh i know... :shock:...surprisingly I know something :shock:
You need to use the formula y=m * x^3 + c  => m= rise/run= 1/3
Therefore you get y= (1/3)x^3, making C the correct answer
Using the points in Option C (1, 1/3), you get the right answer ...
If you want me to explain it further just let me know

it took me a bit but i get it now. i had the gradient but i sort of lost the plot after that (plot hah - feel free to use that one lads)