[Article in German] BÃ¶hm M. Adenosine has a negative inotropic effect in cardiac atrial preparations (direct negative inotropic effect). This effect is probably due to an activation of a potassium outward current which shortens the action potential duration and hence reduces the force of contraction.
A scatterplot is a graph that is used to plot the data points for two variables. Each scatterplot has a horizontal axis (x-axis) and a vertical axis (y-axis). One variable is plotted on each axis.
1 Insert a linear regression line (trendline) into the scatter plot. 2  Use the slope/intercept formula for the regression line to calculate a x value for a known y value. 3  Explore curve fitting to scatterplot data.  Create a connected point (line) graph.