To me, I see the bx as the slope of the curve as it passes through the y axis
Also the link does not work for me. I am guessing it is trying to send me to a specific graph that i do not have access to or something. If I just go to https://www.desmos.com/calculator it works fine though. You just need to put this in the text field “y=ax^{2}+bx+c” then hit the “all” button below to get your sliders to play with
Thank you for the continued feedback, you’re awesome!
It’s a great observation and is exactly what ‘b’ is doing.
I was originally worried about getting too technical when I originally recorded the lecture but, looking back on it, I could definitely add this without falling into discussions about differentiation and the like.
In a nutshell, if you were to set ‘a’ to 0 then you’d end up back at a linear equation, at which point ‘b’ would be controlling the gradient of the line.
So it is correct to say that ‘b’ is controlling the gradient of the curve at the point where it intersects the y-axis.
I’ll aim to change the video this week to improve the explanation - thanks again for the suggestion.
I’ve checked the link and it doesn’t seem to work if you click on it. I’ll get that reported to see if it can be fixed.
If you copy/paste the link though, you should be able to get to the page. If you can’t, let me know and I’ll report it, as the page should be publicly visible.
If you copy/paste the link though, you should be able to get to the page. If you can’t, let me know and I’ll report it, as the page should be publicly visible.
Copy/Paste is working for me. Thanks
Thanks for the extra info, much appreciated.
I’ve also gone in and made the shared resource easier to work with, based on your suggestion of adding sliders. You can find it here: https://www.desmos.com/calculator/f1yttcq2e2
Let me know which one you prefer.
I like the new graph setup with the sliders. It is less busy and the sliders have a nice feedback imo. I think it is also good that you have graphs with A, B, and C all together and isolated on their own. The links are also all working for me now by just clicking them so that is great. I tried both the one you just posted and also the one that is in the video resources right now.
BTW is there a easy way to get to the video associated with a post? I have just been going back through Courses > My Courses > Math For Games > The Quadratic Equation to get back to it. If there is an easier way to get there from this page I would love to know about it, and if not that would be a great thing to add if possible.
Glad you like the improved one. The old link in the resources should be changed over to this one soon.
Good question. As far as i’m aware, there’s no easy way to get to the video from a forum post but I’ll ask the question to see if this is something that is possible to implement.
In the meantime, I tend to just open the forum threads attached to each lecture in a new tab.
I’m also aware that a few of the later videos in the “Algebra and Equations” section that can’t be tagged properly, so threads won’t appear under the lecture. This should be fixed soon.