Question

HOW DO I GRAPH POLAR COORDINATES ON MY CALCULATOR? TI-84

Answer 1

Press [Stat] and select 1:Edit...

Under L1, input all the x-coordinates (in this case 1, 2, and 3). Under L2, input all the respective y-coordinates (3, 4, and 5).

Press [2nd][Y=](Stat Plot), select the first Plot and turn it on. Here you can change the way the points are displayed, the type of graph, etc. Now press [Graph] or [Zoom] > 9:ZoomStat. Your points should now be graphed on the screen.

Edit: In order to find a line of best fit, you'll first need to decide what type of line the points follow. If the points lie in a straight line, then linear regression would be best. If the points are parabolic in shape, then quadratic regression would be better. These regression command can be found under [Stat] > Calc.

Answer 2

https://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=71683

Answer 3

@WeedKushh_ I don't think that's relevant, looks like that's for lines of regression, not polar equations.

Answer 4

So if I am trying to insert "r = 4cos(3θ) with θ between 0 and 2π"?

Answer 5

I see the image where it inserts " 1 - sin(θ)" but it doesn't apply to every equation right?

Answer 6

θ doesn't have to be between 0 and 2pi, it'll depend on the equation.

Answer 7

It should look like this. http://www.wolframalpha.com/input/?i=r+%3D+4cos%283%CE%B8%29

Answer 8

Okay! But with an equation where it isn't in "r =" format, how do I change it. Like with this "rcsc(θ) = 7" ?

Answer 9

you need to change your mode to POL

Answer 10

press Mode
4th line change FUNC to POL

Answer 11

your y= screen will change to r= and your x key with turn into theta

Answer 12

My calculator is still not working!

Answer 13

What should my WINDOW look like?

Answer 14

You can try using the zoomfit/autofit function (or something similar). press zoom when on the graph screen.

Answer 15

zoom 9 should fit your function, try picking degrees or radians, you will have to play around with it........

Answer 16

r csc(θ) = 7

r/sin = 7

r = 7sin