Exam advice?

[linahh123]

do you need a scale when you're sketching the graphs in the exam? do you lose marks for incorrect notations?? e.g. using scientific notation ln instead of loge?

[Duck]

If they ask for an exact answer and you give an approximate answer then clearly you're wrong. Not sure about needing a scale.

[the.watchman]

You don't need to specify a scale, but your sketch has to be 'to scale'

[Jdog]

i thought if they ask you to sketch something they give you the axis and everything

[brightsky]

You don't need to specify a scale, but your sketch has to be 'to scale'

So even if you have numerical values besides the intercepts, you'll still lose marks if they are not drawn to scale? I mean, to use an extreme example, if we have (0,100) as a y-intercept and (0.000001, 0) as an x-intercept, does the graph still need to be to scale?

[AzureBlue]

You need to mark a "break" in the scale to indicate that its out of scale (eg. if you go from (0,1) to (0,1000)). And I think the y-values need to be in scale with each other... and the x-values need to be in scale with each other. But the x values don't necessarily have to be in scale with the y values.

[brightsky]

You need to mark a "break" in the scale to indicate that its out of scale (eg. if you go from (0,1) to (0,1000)). And I think the y-values need to be in scale with each other... and the x-values need to be in scale with each other. But the x values don't necessarily have to be in scale with the y values.

Strictly speaking, I don't think the "break" is mathematical in sense; it's mostly used in science and geography and whatnot.

[AzureBlue]

Strictly speaking, I don't think the "break" is mathematical in sense; it's mostly used in science and geography and whatnot.

That's what my maths teacher said... if we ever have trouble getting extreme values in scale. But it doesn't happen too often.

[the.watchman]

You don't need to specify a scale, but your sketch has to be 'to scale'

So even if you have numerical values besides the intercepts, you'll still lose marks if they are not drawn to scale? I mean, to use an extreme example, if we have (0,100) as a y-intercept and (0.000001, 0) as an x-intercept, does the graph still need to be to scale?

I didn't mean that the axes have to have the same scale, I meant that, whatever scale you choose, the graph must be the right shape, so that (2,4) has double the distance from the x-axis and double from the y-axis as (1,2) if you get what I mean

[8039]

How well drawn do they have to be? i.e say you have a cosine graph and make one of the turning points higher than the other, but you label it correctly, will it matter?

[8039]

You need to mark a "break" in the scale to indicate that its out of scale (eg. if you go from (0,1) to (0,1000)). And I think the y-values need to be in scale with each other... and the x-values need to be in scale with each other. But the x values don't necessarily have to be in scale with the y values.

Strictly speaking, I don't think the "break" is mathematical in sense; it's mostly used in science and geography and whatnot.
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Normal distribution?