On a coordinate graph with y on the vertical axis and x on the horizontal axis,suppose that two points on a straight line are (X = 4,Y = 5),and (X = 2,Y = 1).The slope of this line is
A)-2.
B)- 1/2
C)1/2
D)4 /5
E)2.

Question

Quizplus · Accepted Answer

The slope of a line is calculated by the formula (Y2 - Y1) / (X2 - X1). Using the points (4, 5) and (2, 1), the slope is (1 - 5) / (2 - 4) = -4 / -2 = 2.

On a Coordinate Graph with Y on the Vertical Axis