Which of the following is true about line graphs?

a. the dependent variable is on the horizontal axis
b. line graphs are always straight lines.
c. every data point should be shown on a line graph.
d. there is a maximum number of data points that can be used in a line graph.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.