# parabola investigation IB HL MathsWatch

#1
Has anyone done this portfolio for maths?

I'm stuck on part 2.

Do the values of b and c stay the same? and you just change a?

Or are you suppose to change b and c as well and find limitations?
0
9 years ago
#2
i need help for number 5 and 6. there are just so many vertices that i don't know which one to take
0
9 years ago
#3
I'm doing this at the moment - i think there's only one vertex, isn't there? the vertex refers to the minimum turning point at the bottom of the quadratic curve? there should only be one.

if you like i can email you mine and you can have a look - but the IB will rape you if you copy it :P
0
9 years ago
#4
I'm doing it as well. I'm stuck on part 2 as well - just the conjecture thing. have no clue on how and what to conclude upon the value of D and a, besides that they have an inverse relation, but then what? what should I prove/state? just don't get it. hope there's someone out there who has the energy and time to explain. would be really helpful. thanks!
0
9 years ago
#5
maybe it's the fact that they have an inverse relation...? :P

make an equation that links D to a
0
9 years ago
#6
@lipson - yeah, change the value of a initially - once you start proving stuff you realise things about the values of B and C
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Thu, 25 Apr '19
• University of the Arts London
Open day: MA Footwear and MA Fashion Artefact Postgraduate
Thu, 25 Apr '19
• Cardiff Metropolitan University
Sat, 27 Apr '19

### Poll

Join the discussion

#### Have you registered to vote?

Yes! (3)
75%
No - but I will (0)
0%
No - I don't want to (0)
0%
No - I can't vote (<18, not in UK, etc) (1)
25%