Sagal

The Pith balls may be positive, negative or neutral. Four pith balls are suspended by insulated threads. The following reaction occurs. a) #2 pith ball is positively charged b) #2 attracts all the other pith balls,. c) #1 and#3 pith balls repel each other...

Your Y-Intercept is 8. From there on the graph you'd go to Positve 8 and from there you'd either go 5 up and 3 to the right or 5 down and 3 to the left....Either one would give you points on a straight line.