Table: the y values have a constant rate of change. For example the y values would be 7, 14, 21, 28 going up by 7 each time. This would not be an example: 6, 12, 17, 18.
Graph: The line of the graph is straight!
Equation: It is in y=mx+b or slope intercept form. Hope this helps!
Ok so I'm guessing you are wondering what is the value of the 3 equal sides. First you subtract 7 from 40 and get 33. Then divide 33 by 3 and you'll get 11.