pls answer asap! :) 80 points! How can you tell which type of graph (line, bar, or circle) is the most appropriate to use for a set of data? Give an example of something that might be graphed by each type.

These graphs are used for very different things:

A line graph is used for tracking changes over time (for example: weather)

A bar graph is used to compare results between different groups (for example: sports)

A pie graph (circle) is used to compare the percentage of data (for example: how many people in the class drive or take the bus or walk ect.)

Hope this helps :)

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.