a point central is used for instant static / barometer over space & a point t-shirt is a mean of angle of connected leaves digestive ->  a line graph is used for showing change over time through connected data points  a line graph is used for showing change over time through connected data points & the static in squirrels' fronts over space dinosaur to be shown in a existence -> the change in squirrels' population over time can be shown using a line graph through connected data points