Did you find Exam 2 easy or hard?

[julianpeiriez]

Wat i did was k=2/5   k^3 = 4/25
the 1- 4/25  = 21/25
= 84%

[rusty54]

I think it was something like 17400, i got it from the point where the lines intersected.

Same here.

[Ilovemathsmeth]

What did you get for graphs and relations, for the maximum profit? If you got 17400, would it be possible to suggest an alternative because it's not feasible to have 4.5 and 5.5 plane trips?

[lachymm]

when ever given the coefficient of determination and a negative trend line you need to make the square root of the coefficient of determination negative, because the relationship between the 2 is negative.

[taylor tay bags]

Core
Question

1a. Circled 14 (April)
1b. 15.5
1c. 91%
2a. November
2b.
2c. Increasing to level in middle months
3a. through y=131 and x=37.2
3b. 37.2
3ci. 80.81
3cii.  .994
4a.  1.1
4b. 241.026cm*2
4c. above average

Module 1: Number Patterns

Question

1a. 37
1b.43
1c.750
1di. 2828
1dii. 3032
1e. 97,398
f. 29
2a. 2%
2b.2659.15
Question 3 was too much for me

Module 2. Geometry and Trigonometry
1a. Rise/Run = 50/400 = 0.125

1c. was 92%... 11/12 = 91.67% rounded to nearest whole percent is 92%..

[rohank]

how was it negative, you just had to square root the co of determination which worked out to be positive

yes, but the graph showed a negative linear assocciation
therefore the r value had to be negative.

[taylor tay bags]

What did you get for graphs and relations, for the maximum profit? If you got 17400, would it be possible to suggest an alternative because it's not feasible to have 4.5 and 5.5 plane trips?

I said 4.5x and 5.5y is max profit of 17,400 i then stated this is not plausible as you cannot have .5 trips so i said the 'realistic' max profit was 17,000 and 5 trips of x and 5 trips of y..

[Ilovemathsmeth]

Yep, agree I got 92%.

[lachymm]

Oh shit u tellin me i got one wrong!

[marshy1111]

yeh why is it negative SquareRoot of the coefficient of determination equals positive .994

[Ilovemathsmeth]

Awesome!! I said that too! Do you think we over complicated it or that was what was required?

[xXNovaxX]

how was it negative, you just had to square root the co of determination which worked out to be positive

From the graph we can see it is negative gradient

Thats what I told myself too, man man man. is aw it as negative slope, but im like how is it the calc says postiive grrrr.

[lachymm]

Nopes cant have .5 plane trips i got one wrong but provided working out so i probs lost 1 mark

[taylor tay bags]

Awesome!! I said that too! Do you think we over complicated it or that was what was required?

Honestly, i didn't really care if it was over complicated i wrote like 7 lines lol on what's plausible and what's not, I'm pretty sure it's worth full marks though

[marshy1111]

yeh i see now shit red the bloody question