dicksont

Produce and interpret graphs that represent the relationshep between 2 variables.

(please ignore the swing and length lables)

This graph is linear, because it has a constant rate of change.  In other words, it increases steadily. (by 2 units)  Usually, you shouldn't make your graph a line graph with equations, it should be a dot graph.  For example, if you had piles of tiles, and the equation to find out how many tiles there were was 2p+1=t  you wouldn't connect the dots because there is no pile 1.5.  On the other hand, if you were counting how far someone walked and how quickly, you would connect the dots because they would still be walking where there were no points on the graph.  A linear equation never uses an exponent or radical.  If it does, well, it simply isn't linear.  It becomes nonlinear.  If you want to see a geniuse's work, there it is.