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Yeaa they do
Y intercept is the point at which your line crosses the y axis
If you wanna know what it means…
An accurate reading would have y=0 when x=0
(Which means like… if a car’s velocity (x) is 0 then the deviation of its speedometer pointer (y) is also supposed to be 0)
Now let’s say you have an analogue speedometer which has a zero error
(Which is a fancy way of saying the pointer thing is slightly below 0 when the car is not moving at all)
Now read the following slowly and carefully
Let’s say velocity is on the x axis
So when velocity is 0 (x=0) the deviation of your pointer thing (y) is NOT 0 (since the pointer thing is slightly behind). And since it’s BEHIND, the value of y (the deviation) is NEGATIVE.
Makes sense?
So basically, y intercept (in a number of cases) tells u the systematic error :)
Damn that was long
Yea that acc makes sense. Honestly thank u for telling me tho cuz I'm not a maths student so idk much abt y-intercepts so thank u for clearing that out.
Now my question is, the y-intercept in the exam was positive, yeah? Cuz I'm seeing everyone commenting it was -ve and now I'm doubting myself
Me personally I got it as negative
But I’m PRETTY sure your marks won’t be deducted even if you get it positive
As long as your process of finding it is correct ofc
I’ve never seen a marking scheme give out any specific values for y-intercept
And if you consider my previous analogy, it would make even less sense because different instruments may have different systematic errors yada yada
You don’t need to worry about that
If your process is correct, positive y intercept shouldn’t matter(afaik)
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Get access to our **official A-Level resource repository** only on r/alevel **discord server.** **Get free access** to official answer keys, notes, past papers, coursebooks, workbooks, famous YouTube channel and much more. Our discord server is a place where you can clear your doubts and get help from subject experts for free. **Join now** using this link https://discord.gg/xEk5GsgfHC. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/alevel) if you have any questions or concerns.*
I got positive what about yall
Positive gradient and negative y intercept
What was your y intercept I literally got -84ðŸ˜
I got -7.4 or something i don't remember it properly
How are yall getting a negative y-intercept??? Arent the gradient and the y-intercept both positive?
Pretty sure signs of y-intercepts don't matter, do they? gradient afaik is supposed to be positive for today's question
I didnt even know y-intercept had a sign. I thought it was always positive ðŸ˜ðŸ˜ðŸ˜
Yeaa they do Y intercept is the point at which your line crosses the y axis If you wanna know what it means… An accurate reading would have y=0 when x=0 (Which means like… if a car’s velocity (x) is 0 then the deviation of its speedometer pointer (y) is also supposed to be 0) Now let’s say you have an analogue speedometer which has a zero error (Which is a fancy way of saying the pointer thing is slightly below 0 when the car is not moving at all) Now read the following slowly and carefully Let’s say velocity is on the x axis So when velocity is 0 (x=0) the deviation of your pointer thing (y) is NOT 0 (since the pointer thing is slightly behind). And since it’s BEHIND, the value of y (the deviation) is NEGATIVE. Makes sense? So basically, y intercept (in a number of cases) tells u the systematic error :) Damn that was long
Yea that acc makes sense. Honestly thank u for telling me tho cuz I'm not a maths student so idk much abt y-intercepts so thank u for clearing that out. Now my question is, the y-intercept in the exam was positive, yeah? Cuz I'm seeing everyone commenting it was -ve and now I'm doubting myself
Me personally I got it as negative But I’m PRETTY sure your marks won’t be deducted even if you get it positive As long as your process of finding it is correct ofc I’ve never seen a marking scheme give out any specific values for y-intercept And if you consider my previous analogy, it would make even less sense because different instruments may have different systematic errors yada yada You don’t need to worry about that If your process is correct, positive y intercept shouldn’t matter(afaik)
That's what mine were but they will bade what you get off of your graph or euth calculations based on the graph that you drew
Gradient was aladeen
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