Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data?

A bar graph is a good choice because Rob is comparing solubility values for three separate salts, which are distinct categories. A line graph is usually used to show how a quantity changes across a continuous variable, such as temperature over time. A histogram displays the distribution of numerical data, while a scatterplot shows the relationship between two numerical variables.

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