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Physics P5 questions

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Gaz:
Usually the 2nd question requires drawing a graph with a line of best and worst fit. Is the error in the gradient of the line of best fit calculated by (gradient of best-fit line – gradient of worst acceptable line)?

falafail:
yep.

falafail:
quick question:
which of these is considered the line of best fit?

this
http://i45.tinypic.com/29ys9c3.png
or this
http://i46.tinypic.com/k0od9d.png
??

Gaz:

--- Quote from: falafail on June 08, 2010, 04:55:48 pm ---quick question:
which of these is considered the line of best fit?

this
http://i45.tinypic.com/29ys9c3.png
or this
http://i46.tinypic.com/k0od9d.png
??

--- End quote ---

i believe it is the 2nd one:
http://i46.tinypic.com/k0od9d.png

falafail:

--- Quote from: Gaz on June 08, 2010, 04:57:23 pm ---i believe it is the 2nd one:
http://i46.tinypic.com/k0od9d.png

--- End quote ---

i know it LOOKS right but the first one passes through more points  :-\
and what exactly IS the line of best fit? isn't it the line that passes through the most points?

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