The starting point for an e=inequality will have either an empty of filled-in circle. When empty, it signifies that the exact point is NOT included. If the inequality is x < 2, for example, the line would begin at 2, but marked with an empty circle. If, however, the inequality is x =< 2, then the circle is filled in, signifying that the number 2 is included in the set.
Turn it into slope-intercept form. 2y = -x + 14 y = -x/2 + 7 The slope is -1/2. Perpendicular lines have slopes that are opposite reciprocal, so the slope of the perpendicular line is 2.
