why is this code giving the answer 1

Question

class Point{
constractor(x,y) {
this.x = x;
this.y = y;
}
static slopeAB (A, B) {
const dx = A.x-B.x;
const dy = A.y-B.y;
return dy/dx;
}
}
const P1= new Point(1,2);
const P2 = new Point(3,4);
console.log(Point.slopeAB(P1,P2));

Answer 1

A.x = 1, B.x = 3
dx = A.x - B.x means 1 - 3 yields -2

A.y = 2, B.y = 4
dy = A..y - B.y means 2 - 4 yields -2

slopeAB() returns <dy> (-2) divided by <dx> (-2) which yields 1.

Answer 2

dx=3-1=2
dy=4-2=2
2/2=1

Answer 3

Thanks 👍