The slope of every horizontal line is…
a. 0
b. 1
c. d. undefined

The slope of every horizontal line is zero.  The slope is calculated by (y2 - y1) / (x2 - x1).  For every point on a horizontal line, its y-coordinates are the same. e.g. (2,8), (4,8), (6,8) etc.  Hence (y2 - y1) = 0 always.  The answer is (a) 0

In a system, there are two linear inequalities. The solution to the system is all the points that satisfy both inequalities or the region in which the shading overlaps. Given the system of linear inequalities shown in the graph, let's determine which points are solutions to the system.

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Step-by-step explanation: