It's a horizontal line! . the graph of y = -2 is. So, what's the slope of this line? Grab two points and see? m = ( y2 - y1 ) / ( x2 - x1 ) = -2. The slope of a horizontal . A line that is perpendicular to a vertical line. On a page, a horizontal line is a straight line that runs from left to right . A line that has a slope value of zero. The horizontal line shows the operatorselected trigger level. . Because respiration has no specific trigger event analogous to the R wave of the ECG, the . the inspiration slope (dashed vertical lines in Figure 12.17), the expiration slope (solid . Oct 8, 2012 - A lot of students get the concepts of 'zero slope' and 'no slope' confused when . We also talk a lot about how vertical lines have a slope that is . . in grams per litre (g.l-1)- (c) What are the units of the slope in each case? . Note how taking logs has 'stretched out' the points on the graph. . Then drop a vertical line down from the line through the data to the horizontal axis (the 'x axis'), . . in grams per litre (g.l-1)- (c) What are the units of the slope in each case? . Note how taking logs has 'stretched out' the points on the graph. . Then drop a vertical line down from the line through the data to the horizontal axis (the 'x axis'), . 39.1, pattern 1) denotes inspiration. . Specifically, in determining the flow rate (i.e., in liters per second), the slope of the volume-time tracing is determined. . (which is on the vertical axis of the volume-time tracing) but is transposed to become the . gas (considered to have zero pressure, so positive compared with negative . Anatomists with wonderful ob- tuseness do not seem to have observed these . upon that beneath it around a transverse axis, so that a vertical line dropped . in extreme inspiration, while those of the external which slope downwards and .