Is it a proportion?

Does the table represent a direct variation (proportion)? A table is a proportion if
• there is a common factor that relates the x value with the y value
• in other words, if x doubles, then y also doubles
• the points form a line when graphed
Look at the values in the table. Do the they form a proportion? Check yes or no. If you need a hint, use the "Hide/Show the line" checkbox. This applet was inspired by Angela Herndon http://www.geogebratube.org/user/profile/id/12746