i will mark brainliest just someone help me quick

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

What in scientific term why the salty popcorn causes this thirst