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anonymous
 one year ago
@peachpi
anonymous
 one year ago
@peachpi

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It's difficult to explain without the visuals so yeah.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.01. The function would be linear? Or cubic?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you were right. it's cubic

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm not sure why some are positive while some are negative.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How is it cubic? Because linear just go's straight up and expo starts stable then swoops up.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because volume increases between some values and decreases between others. positive rate of change means the function is increasing, negative rates of change means it's decreasing

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the rate of changes are just the volume of the cubes right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay that's cleared up.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no, the rates of change are the CHANGES in volume over the interval. So going from 1 cut to 2 increases volume by 28 cubic units. Going from 3 to 4 decreases volume by 44 units

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay confusion cleared.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you know it's cubic because volume is in cubic units for one. tbh, this question is incredibly misleading. This is like the one we did where the equation turned out to be 2^x. You're building your data from a specific function, so you don't really need to do regression. That's what @mathmate was saying. When you do regression you're going to get the function you used to build the data

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0When you calculate volume, you're using \[V=x(122x)(122x)\] That's exactly what you'll get when you do regression

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so should I tell you the height of all of my cubes? Maybe that will also help me understand this better.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok. If you use the spreadsheet to do regression, make sure you're using the right degree on the polynomial. It's cubic so it should be degree 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The heights are 1, 2, 3, 4, and 5, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thats what YOUR equation looks like sorry thats what I meant

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0mine looks like y= 4x^3  48x^2 + 144x  1.123E12

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So the equation is 4x³  48x² + 144x because 1.123E12 is very close to 0 and it can be dropped. The r^2 = 1 means that that equation is an exact fit for the data, which makes sense b/c we used the equation to create the data. In general the closer r^2 is to 1, the better the fit. Also 4x³  48x² + 144x is what you get if you multiply out x(122x)²

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0into the equation we just got?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because x is the change of volumes right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x is the size of the cut y is the volume the rate of change is the change in volume

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay got it. so it's 122.5

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0not sure if if I round up.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well thank you again so much. I won't bother you again ever lol. You're the best x100

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0haha its no bother. you're welcome
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