FIGURE 2-1
-On a coordinate graph with y on the vertical axis and x on the horizontal axis, suppose point A represents
Co-ordinates x = 2, y = 16) and point B represents coordinates x = 10, y = 4). What is the slope of the straight line joining points A and B?
A) 0.75
B) -0.75
C) 1.5
D) -1.5
E) -0.43

Question

FIGURE 2-1
-On a coordinate graph with y on the vertical axis and x on the horizontal axis, suppose point A represents
Co-ordinates x = 2, y = 16) and point B represents coordinates x = 10, y = 4). What is the slope of the straight line joining points A and B?
A) 0.75 
B) -0.75 
C) 1.5 
D) -1.5 
E) -0.43

Quizplus · Accepted Answer

The formula for slope is (Δy)/(Δx). 
Using points A and B, Δy = 4-16 = -12 and Δx = 10-2 = 8. 
Therefore, the slope of the line joining points A and B is (-12)/(8) = -1.5.

FIGURE 2-1 -On a Coordinate Graph with Y on the Vertical Axis