VCE General & Further Maths Question Thread!

[PopcornTime]

Just have a few questions. See attachments.

How do we answer question 3 vcaa exam 1 2010 (attached).

Why is the r value close to 0.78 in question 7 vcaa exam 1 2010? Doesn't this mean the association is strong, which the graph doesn't seem to be.

[PopcornTime]

are the vcaa 2010 answers wrong for question 4 a) ii). See attached.

[YggdrasilMamel]

For the correlation problem, it's more of process of elimination. D and E are obviously incorrect because they have a negative value. C is unlikely as 0.2.. is not that strong of a correlation, and we at least see some of that on the graph. Looking at the graph, we can easily tell that it's not a perfect correlation, so we can assume it's not A so it must be B. It's a little wishy-washy, but all the other answers are too farfetched.

[AngelWings]

How do we answer question 3 vcaa exam 1 2010 (attached).

It's been done recently.

are the vcaa 2010 answers wrong for question 4 a) ii). See attached.

I'm assuming this is from the financial maths module. Back in my day (which makes me sound old), financial recursions wasn't a part of the core modules, so I haven't done financial maths in ages. I'll leave this to someone else. Sorry!

[galaxy21]

are the vcaa 2010 answers wrong for question 4 a) ii). See attached.

Yes, looks like they have included a decimal in the wrong spot... the working out included beneath gives what would be the correct answer, you just need to round it to the nearest whole number.

Therefore, the final solution would be $188557

[galaxy21]

Hi.
Is somebody able to explain how to work out this answer? Its from the 2015 Exam 1 VCAA exam.
I would have thought that you work out the amount of interest that is earned (5885.72-5870.5=15.22) and then divide this by the lowest monthly balance (15.22/4870.5=0.00312493), and then multiply it by 100, but this does not give any of the answers.

The correct answer is D.

[PhoenixxFire]

Hi.
Is somebody able to explain how to work out this answer? Its from the 2015 Exam 1 VCAA exam.
I would have thought that you work out the amount of interest that is earned (5885.72-5870.5=15.22) and then divide this by the lowest monthly balance (15.22/4870.5=0.00312493), and then multiply it by 100, but this does not give any of the answers.

The correct answer is D.

That’ll give you the monthly interest rate. You then have to times it by 12 as the question asks for the annual interest rate.

[galaxy21]

That’ll give you the monthly interest rate. You then have to times it by 12 as the question asks for the annual interest rate.

Haha yep that would make sense! I knew I was on the right track! 
Thank you!

[PopcornTime]

How to answer question 2 b) from 2009 further exam 2?

[galaxy21]

How to answer question 2 b) from 2009 further exam 2?

2b from which section of the exam?

[PopcornTime]

2b from which section of the exam?

business sorry!

[passbleh24]

Hey so for this question I was asked explain association.

As you can see, although the box plots have scales of 5 i wasn't accurate in my estimation of the medians of the three years. I estimated 51, 62 and 69. Would this still be considered right or would I need 52, 63 and 69 to be right.

Thanks!

[S200]

How to answer question 2 b) from 2009 further exam 2?

$250, $6 interest
Assume 12 months payment.

\(6\times 12=72\)

\(\frac {72}{250}=0.288\)

Therefore,
28.8%

[galaxy21]

Hey so for this question I was asked explain association.

As you can see, although the box plots have scales of 5 i wasn't accurate in my estimation of the medians of the three years. I estimated 51, 62 and 69. Would this still be considered right or would I need 52, 63 and 69 to be right.

Thanks!

I would assume on these sort of questions that they would have some extent of leniency as to what is considered to be correct and incorrect, as there really isn't a clear number that each median corrosponds with.

[PopcornTime]

need help with

2013 Further exam 1, business related maths, question 4 and 7

2018 NHT further exam, matrices, question 8

Thanks