1. ## curve

How do you find the 'constant rate of change in a table'?
x=1 Y=1
=3 =2
=5 =3
=7 =4

The answer is 1/2; but i have no clue as to how my teacher obtained that answer. If you can take some time to help, i would appreciate it greatly.

2. When thinking about the rate of change of a graph, it's normal to think of this rate as a fraction of (change in y)/(change in x). If the rate of change is constant, that means the slope of this graph is constant and you are talking about a line. Take the first two points (1,1) and (3,2). The rate of change between these points is (2-1)/(3-1) = 1/2. Try the other ones.