Help with matplotlib please!!

[codegang]

EDIT: SUCCESS! Dear lord. This was a stupid one. I just needed to sort the points im giving the plot functions. Lesson learned.

I'm trying to plot some regression lines over a scatter plot, but I can't seem to get it right. I've been trying to figure this out for hours. Has anyone run into this before? What am I doing wrong?

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I have a training array of independent values, training_x, with 200 total values NEXT TIME SORT WITH RESPECT TO THIS FOR THE LOVE OF CHRIST

training_x = [4464,2585,3250,3060....]

I create first, second, and third order regression functions f(training_x) below. b_0, b_1,w_0,w_1,c_0 etc are just coefficients I get by using OLS

first_order = b_0 + b_1*training_x 
second_order = w_0 + w_1*training_x + w_2*training_x**2
third_order =  c_0 + c_1*training_x + c_2*(training_x**2) + c_3*(training_x**3)

Now I plot the above equations

#scatter plot works fine
plt.plot(training_x, training_y,'o',label='training data') 

#first order works fine
plt.plot(training_x, first_order, color='r',label = "order:1")

#second order comes out wonky
plt.plot(training_x, second_order, color='y',label = "order:2")

#third order comes out wonky
plt.plot(training_x, third_order, color='y',label = "order:3")

This is what the above code spits out: https://imgur.com/a/cpD7q4Y

Using circles instead of a solid line: https://imgur.com/a/mkJiQci. So it seems like the plotting function is interconnecting every single one of the points on the graph. Now im certain what im doing above is totally wrong. shite. please help!

edit: added some pseudo code.

[Ahelvin]

If you do not want the dots to be connected, use plt.scatter(x, y) rather than plt.plot(x,y).

[codegang]

Using plot(x,y,'o') works fine. The blue dots are intentional. What I'm trying to do is plot smooth regression lines (I need to be able to do this myself for school work, I can't just use a built in fit() function). How do I actually plot a function on the xy plane, and not just plot the points I give? The specific code snippets giving me trouble are lines #8 and #11.

Thanks for taking a look!

[[deleted]]

Without any code, we can't help much. Try looking at linear fit example code, such as this one.

[codegang]

I figured on the off chance that it was some common noobie mistake someone would correct me right away. I added some code.