Question

Line AB contains points A(1,2) and B(-2,6).The slope of line AB is

A) zero

B) undifined

C) positive

D) negative

Answer 1

D. Because 2-6=-4 and 1--2=3, and the y value goes over the x value, so your answer would be -4/3, so the solution would be D because if the negative.

Answer 2

(1,2)(-2,6)
slope = (6 - 2) / (-2 - 1) = -4/3.....slope is negative

little tip *** if u have 2 sets of points, and the x's are the same, u have vertical lines with a slope undefined. If u have 2 sets of points, and the y's are the same, u have horizontal lines with a slope of 0. Otherwise, u use the slope formula : (y2 - y1) / (x2 - x1) and see if the slope is + or -