Which of the following statements about line graphs is true? 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.

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.