TRACKER is an equation-graphing game. Graphs are hidden on a coordinate grid. You enter their equations to "track" them. You get clues to the graphs' locations by using "probe shots." Probe shots are equations of horizontal or vertical lines. When a probe shot crosses a hidden graph, it marks that point with an X or an 0. The types of graphs you choose include the following: .straight line .parabola .circle .ellipse .hyperbola (two kinds) There are three levels of difficulty: Practice is a good place to start. You choose the type of hidden graph. Either one or two graphs are hidden on the grid. No score is kept. Novice Game allows you to choose two types of graphs. Three graphs are hidden on the grid (two of one type and one of the other). One type of graph is marked by X's and the other by O's when hit by a probe. When you have enough clues, you send a tracker along the graph by entering its equation. Expert Game chooses the two types of graphs at random, so you'll need to discover what type they are as well as where they are! You choose how many graphs are hidden, three through six. Scoring You score points for correctly tracking each graph: Graph Type Points Scored straight line 30 points parabola 35 points circle 40 points ellipse 45 points hyperbola 50 points You lose points for each probe and for incorrect trackers: Action Points Lost first probe 1 point second probe 2 points third probe 3 points ..and so forth incorrect tracker 10 points