On a coordinate graph with y on the vertical axis and x on the horizontal axis,suppose point A represents coordinates (X = 2,Y = 12)and point B represents coordinates (X = 6,Y = 4).The slope of the straight line joining points A and B is
A)5.
B)- 1 / 2
C)1 / 2
D)-2.
E)2.

Question

Quizplus · Accepted Answer

The formula for slope is (change in y) / (change in x). 
In this case, the change in y is (4 - 12) = -8 and the change in x is (6 - 2) = 4. 
So the slope is -8/4 = -2. Therefore, the correct answer is D.

On a Coordinate Graph with Y on the Vertical Axis