What's the equation for a line when x is an array of multiple items?

Question

(Pictured below) I've used Matplotlib in Python to plot a line from a*x+b when
a = -1.1374117136001587
x = array([0.0427 , 0.46546, 0.05329, 0.95268, 0.98098, 0.08189])
b = -0.4280948340892792

I can't figure out what was done with the values in x to draw the line the way it's drawn. I tried mean, mean squared, sum, product and tried plotting all on the Desmos graph.
By eye-balling a recreation of the line it seems it drew this, with something near...
y=-0.3x-0.4280948340892792

I also tried looking in the Matplotlib code to find the equation

A screen shot of all values in Python and the graph

Answer 1

The red line fits your $ax+b$ rather well. It should extend from about $(0,-0.428)$ to $(1,-1.565)$ and it looks like it does. The $x,y$ values of the blue points match your arrays as well. I don't see anything indicating where the arrays $x$ and $y$ came from.