What step does the r in prices stand for? why is this step important?

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.

Ibelieve the answer is either b or c, but i'm leaning more towards c.hope my answer has you : )

Answer///(d) atoms contain small,negatively charged particles;