Question

It does not matter which of the two points of a line you choose to call (x1, y1) and which you choose to call (x2, y2) to calculate the slope of the line.

Answer 1

true...
example :
(5,3) x1 = 5 and y1 = 3
(3,2) x2 = 3 and y2 = 2
slope(m) = (y2 - y1) / (x2 - x1)
slope(m) = (2 - 3) / (3 - 5)
slope(m) = -1/-2 = 1/2 ==> slope is 1/2
now lets switch our points
(3,2) x1 = 3 and y1 = 2
(5,3) x2 = 5 and y2 = 3
slope(m) = (y2 - y1) / (x2 - x1)
slope(m) = (3 - 2) / (5 - 3)
slope(m) = 1/2 ==> slope is 1/2

Answer 2

thank you

Answer 3

your welcome :)