
309Chapter fourteen: Measure
the x-axis value intersects the y-axis value. (If two dots fall together, put them side by
side, touching, so that you can see both.)
• Look at the pattern of points to see if a relationship is obvious. If the data clearly form
a line or a curve, you may stop. The variables are correlated. You may wish to use
regression or correlation analysis now. Otherwise, complete steps 4–7.
• Divide points on the graph into four quadrants. If there are X points on the graph,
• Count X/2 points from top to bottom and draw a horizontal line.
• Count X/2 points from left to right and draw a vertical line.
• If number of points ...