The bar graph is given ,which shows the amount of time Latisha participated in an exercise program over a four-week period.

If amount of exercising , that is increase over time appear larger

She must use a larger range on the vertical scale.There will be no change in width of bar graph, as coloring the bar graph with different color will make no sense.

Pictorial representation of this problem is depicted below:

Option (B) is true.Use a larger range on the vertical scale.

This answer is correct in the sense that , if time of exercise increases,

Otherwise, if you increase the width between two whole numbers, the graph will appear larger.That is between if width between 0 to 1 is 1 cm than increase it by 1.5 cm or 2 cm, that will make the bar graph larger.