Question

I know that slope of line = (y2-y1)/(x2-x1).
But i am confused, how we select the term y2 ,y1 x2 and x1 for solving, when i got R(4, 1.5 ) and Q(-2, -3).
Is it necessary R(x2, y2 ) and Q(x1, y1).

Answer 1

question is clear for you??/

Answer 2

not at all. no one says which one is "first" and which one is second. you just have to be consistant

Answer 3

I think it doesn't matter which point you
assign x1,y1 or x2, y2 since we are mainly interested in the difference between the two points in question. You just need to be consistent.

Answer 4

In fact, (-3-1.5)/(-2-4) should be equal to (1.5+3)/(4+2)

Answer 5

oky, thank you both

Answer 6

no worries!