Tuesday, December 30, 2025

line chart

 

A student conducts an experiment in which they dissolve 1 g each of several substances in 50 mL of water. They have 12 identical plastic cups of water. They place 1 g of salt in three cups, 1 g of sugar in three cups, and 1 g of baking soda in three cups. Three cups contain only water. They place all the cups in a freezer and record the temperature in each cup every 15 min for 4 hr. Which of the following is the best way for the student to display the change in temperature over time?
Pie charts compare the values of different parts of a whole, and not changes over time.
Bar graphs can compare resulting data from different experimental groups over larger changes of time.
Venn diagrams show similarities and differences and are not used to represent changes over time.
MY ANSWER
Changes over time are best represented by a line graph.

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