Find the approximate slope of the line that contains the points (5.1, -2.8) and (6.4,-1.2). State whether the line is increasing, decreasing, horizontal, or vertical.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The slope is (fill in the blank)
B The slope is undefined
Is the line increasing, decreasing, horizontal, or vertical?
Horizontal
Increasing
Decreasing
Vertical