Anyone done VCAA 2005 Graphs and Relations?

[kenhung123]

I have a particular problem with jii.
The answer says all solutions from (0,60)to (15,40) but (0,60) isn't in the feasible region?
I said from (6,52) to (15,40) coz that's in the feasible region

[masonnnn]

yeah that got me too,
the key part of the question is "pepi is now allowed to operate each street stand for as many hours as he wants"
so the feasible region is extended all the way to 80 on the y-axis and 100 on the x-axis.

[kenhung123]

Hmm? Then doesn't that mean there is no constraints?:S

[masonnnn]

it means the x<64 and y<52 constraints are gone. they were the amount of hours he was able to keep each store open for and they no longer exist.
So Line A and B are still constraints, yet the feasible region is extended above the amount of hours which restricted it

[kenhung123]

Thanks that is so tricky@

[masonnnn]

yeah it's so subtly mentioned i didn't pick up on it either, hate when little things like that result in failz.