Movable Points

can you limit the movable point to only move along a static line or curve?

Mbraun17: Yes, you can limit a movable point to only move along a static line or curve: if you want to limit a point to stay on f(x), write this (a,f(a)). For Example (a,sin(a)) will make a point that is draggable along a sine wave and will set a to the points x coordinate.

Can we limit the movable point to only move along the unit circle x^2 + y^2 = 1 ?

how do you attach an image to the movable point? I am doing an angry birds quadratic project, and want a yellow bird image to attach to a movable point on my parabola. How do I do that? Thanks!! ~ Sara

here's my graph: https://www.desmos.com/calculator/1ymdc2grqz

Sara - try putting the center of the image as (a, f(a)) and play the slider to move the image. Let us know if that does the trick!

Is it possible to graph more points, such as y3 & x3? (The Three's being lower.)

Dion - you can create multiple movable points within a graph such as (a,b) and (x1, x2). 

can you make a triangle based on this theory

You can create a triangle by making a table of points and connecting them!

Is there a way to have a triangle with two stationary points and one movable, if so can someone show me?

Try using a table to achieve what you're looking for: https://www.desmos.com/calculator/etxitn5krt

is there a way for moving point to have restriction? i am trying to make a box where there appears to have a ball bouncing around inside but i cant get rid of the excess 'balls'. i would like for it to seem like there is only one ball. here is my project: https://www.desmos.com/calculator/zqoio2i2p9

https://www.desmos.com/calculator/rmsfkitchp

There is a problem...

Bradstein: What sort of problem are you seeing? If you're able to describe it, we might be able to help you resolve it.

If you move the point on the left to the right side, the line dissappears. It's the same for all 3 points.

http://wikisend.com/download/769296/2016-07-07T23-03-21Z.webm 

Bradstein: Thanks for the clarification. I've updated your graph with a little trick so that the triangle side considers min and max in the range restriction. https://www.desmos.com/calculator/lge94lcy0l

You can use this approach to update the other two sides. Let me know if that helps. :)

If you still need help with that Bradstein, I would recommend something like this. I am not sure if this is the most efficient way, but it is what I usually do. https://www.desmos.com/calculator/kklsw2ur5e

How to limit movable point only move along circle or ellipse?

Or getting a movable point on something like 0=x^3 + y^3 - 6xy ?

Is there a way to move multiple points at once the same time?

Same variables in one point as the others

How do you attach a movable point to the intercept point of two graphs so that you get a continuous read out of the coordinates of the intercept? Here is my graph: https://www.desmos.com/calculator/w3p0utvdzp 

I have a hyperbola with its vertex on the circumference of a circle. The circle is moving around around the point (5, 5) in an eliptical orbit. How do I put a circle on the hyperbola so that it moves along it and never leaves it. Here's what I have so far: https://www.desmos.com/calculator/csfgmn3u7f

Thanks

As in cartesian we do like this https://www.desmos.com/calculator/ll3mv9e7lm similarly If i want a movable point that should move on the polar curve like  https://www.desmos.com/calculator/f1456ab1c3 by using slider. what should i do? 

What about getting a moving point along an ellipse, but while the ellipse is rotating. I am trying to graph the orbit of mercury.

I know it's rough, but here is what I have so far: https://www.desmos.com/calculator/hudstsh8pj 

Is it possible to copy some of the "Build a bigger fence" activity? I love it and want to use it for an intro to quadratics, but the first slide is very misleading to students, as "all areas are the same" is not an option. Is there anyway I can copy/edit this? thanks

When we duplicate a movable point, it uses the same parameters as its clone. Then, to make it independent, we need to use another pair of ordered parameters. But the problem is when we wanna get like 10 movable independent points, we need to define 20 parameters, two for each. Is there any other way to do this?

(a couple of mins later) Hahaha, I find a solution just now ( https://www.desmos.com/calculator/dgqo7mrdk8 ), You make a table and change the type of all the points to "movable" at once :-)

Does the movable points thing only work with some graphs? I can't get it to work (the drag section of point editor doesn't show up).

https://www.desmos.com/calculator/hst3kuojjk