All Answers 358089 Answers

You can use the Solve equations function to find the coefficients of a polynomial that fits through a number of points and then plot the resulting function in MM4.

For example, suppose you wanted to fit y = a.x² + b.x + c through the points (-2, 3), (1, 6) and (2, 15)

You can do this with MM4 (though, annoyingly, you have to use x1, x2 and x3 for the unknown coefficients, whereas you really would like to use a, b and c so as not to confuse the unknowns with values on the x-axis).

Having done this you can plot the graph of the resulting function (which you have to construct manually, now you know the coefficients):

I didn't bother turning off the axes in the above, although that can be done of course.

No MathsGod   this cake is fantastic, it looks wonderful and tastes great, from it we can take an infinite number of large slices and it NEVER goes stale.  

So you can have a slice and it will taste great.  You can come back next week or next year and it will still be just as available and it will look and taste just as good.

Here is a slice especially for you :)

You have joined in MG and that is fine :)))

LOL  

I do not think that would work for everyone MG.

Not everyone finds mathematics as pleasurable as you and I do.  :))

Hi Zac :))

I just entered 3/5t   and this was the ouput I got.         $${\frac{{\mathtt{3}}}{{\mathtt{5}}}}{\mathtt{\,\times\,}}{\mathtt{t}}$$                 Mmm

I just hovered over yours and it said 3/(5t)   that is different - did you put the brackets in there?

Maybe the calc does interprete it differently depending on how it is used.  It sometimes acts a bit like a spell checker.  Mostly the changes are for the best but sometimes it gets things wrong.

This is yet another reason that it is good to always use brackets - especially if there is any chance of misinterpretation.  

Edit:     Sorry Badinage - For a moment I thought this was your post

"do you mean you want the calculator to find a curve that passes through the specified points and then plot the curve?"

There are many alternate things that I want but yes,

If I could give the basic shape with a general formula and then add whatever other criteria that I wanted, that would be great.

Desmos would be able to do some of it if I had the option of NOT displaying the axes and/or  NOT display any numbers on the axes.

I assume with your graph you just did not display the axes?

Step 1) Stare at your keyboard.

Step 2) Look for two lines than looks like this = 

Step 3) Click it (ctrl may be needed) 

PS: Thats how everybody found out.

I guess I'm too young to join this conversation.

(My knowledge is still developing)

Do some Math.

Hahaha. Lol! Just be glad the dairy stopped there.

Be an accountant.??//+

I sure did have fun. :)

Memories will be shed.

I think more people in the world should play this game. 

:)

Haha. Lol Melody. XD

Thanks Alan and Melody.

I haven't learnt/heard of number theory.

At first I had the thought it was in Probability. But I wasn't sure.

Well, the Microsoft one can do your first condition (see below), though I'm not sure about your second one (do you mean you want the calculator to find a curve that passes through the specified points and then plot the curve?).

.

.

Thanks :)

2/5t just immediately jumps out to me as $${\frac{{\mathtt{2}}}{\left({\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{t}}\right)}}$$ :/

Welcome back Rosala. :)

Yes that sounds logical Alan but the other one was not 32 bit  it was 90 something :/

--------------------------------

For a long time now I have wanted a graphing program where I could give some info and get a suitable graph generated.  Maybe without any numbers on the x or y axis.  

I often just want to display the shape of the graph.

Like 

graph ax^3+bx^2+cx+d     a>0         [no axes]

or

graph ax^3+bx^2+cx+d     a>0  through  (0,3)(0,-2)and (20,7)

If anyone sees software like this I would REALLY like to know about it!

The 64 one will only work on 64-bit computers.  The other one will work on both 32 and 64-bit computers. 

Okay so it might sometimes be a good alternative to the paid version of Wolfram|Alpha.

There were two download versions.  I wasn't sure what the difference was.  I just chose the 64 one :/

I've only recently come across this calculator, so I've been trying it out.  It's ok, though it does have a few annoying features (for example, changing the colour of lines on a graph is cumbersome), and it isn't powerful enough for general "industrial" use, but it should be very useful in an educational environment.  One useful feature, for example, is that after you solve some equations you have the option to examine the solution steps  as well as just see the results (though this option isn't offered for the cubic solution above I notice!).

$$(\sqrt{a}+5)^2 = (\sqrt{a})^2+10\sqrt{a}+5^2=a+10\sqrt{a}+25$$

Thanks Alan,

I have seen you use that calc a few times.  I should check it out :)

$$\\(4x^2y^4)^2=16x^4y^8$$