Railing cost will be affected by intricacy of the design of the railings and baluster, number of posts, type of material, type of mount, curve, etc. Regardless, if you hire a professional carpenter to fix or install your stair railings, you can be sure that you and your family are safe.
Your basic choices are bar graph, line graph, pie chart, or scatter plot. BAR GRAPH â This is the most common type for science fair projects. You may select a bar graph when your independent variable is qualitative (categories) or quantitative (numbers). LINE GRAPH â This is the second most common, but frequently used incorrectly, so be careful here. You should only select a line graph if your independent variable is quantitative (numbers) and you hypothesized that the changes in the independent variable would result in changes in the dependent one.
As long as the context is clear, any placement is valid. Note however that it is a convention to put the independent variable on the horizontal axis, and the dependent on the vertical. Any departure from this should be explicitly noted for clarity. You could even call the independent variable f, and note the function x is you want, and graph the function x(f)... it's just a notation, but you can see how thing could be played with, and how it could be made as obscure as one wishes... if that is what you want! :).