What are coordinate graphs used for?
These graphs are used as a visual aid, usually to show a relationship between whatever X is and whatever Y is. When we deal with numbers alone, sometimes we miss patterns. By putting the information on a coordinate graph, the picture is clearer. Graphs like these appear as descriptions or trends over time, like how an investment has increased or decreased, or the growth of plants with different fertilizers. Any time two things can be related (so that a change in one means a change in the other) a coordinate graph can draw a helpful picture of what’s happening. A basic problem in coordinate graphing. A gardener wants to know how much plant food to use on her tomatoes. She tries different amounts and measures how many pounds of tomatoes she gets with each amount of fertilizer. After gathering all these numbers, she puts the information on a coordinate graph to see if there is a pattern.
