Question

How do you model upper and lower boundaries?

Answer 1

If we are told that a piece of wood is 12cm long to the nearest cm, then what is the range of possible lengths it could be?
It must be at least 11.5cm long to round up to 12cm. But it must be less than 12.5cm, to round down to 12cm. If it was 12.5cm or more we would round up to 13cm.
Since 12.5cm is the upper limit we call this the 'upper bound'.
So we say that 11.5cm is the lower bound and 12.5cm is the upper bound for the length of the piece of wood.

from : http://www.bbc.co.uk/schools/gcsebitesize/maths/number/roundestimaterev5.shtml

Answer 2

they have to be given to you or you need 2 equations and the low and upper bounds are where they intersect

Answer 3

@cindybear13 try out this question:
A fence is 22m long to the nearest metre. What are the upper and lower bounds?

Answer 4

H'okay. So the upper would be less than 22.5m and the lower would be like.. 21.5?

Answer 5

correct

Answer 6

yougot it correct or copied

Answer 7

@timo86m your example makes the most sense for the situation I have been given as I have a parabola and a linear equation that passes through the parabola.

Answer 8

haha copied? oh you posted a link. lol i didn't notice sorry.

Answer 9

np?? u r learning

Answer 10

yeah thankyou :)

Answer 11

Then that is what it is Cindy. Are you doing integrals?