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"Constant rate of change" can also be referred to as "slope". To find the slope of a graph, or a series of points, you take the coordinates of any two parts a line and fit them into this equation:

.

For example, say you have a line that intersects the points (2,1) and (6,3). To find the slope,

you decide which of the two points will be (x1, y1) and which one will be (x2,y2). Changing up the

order doesn't affect the answer you get, so it's usually easier to just make the first point given your

first point. In this problem, after plugging in the numbers, you get

, which equals 1/2. Therefore, your slope equals 1/2. Slope can also be expressed as "m" (m = 0.5).

To do this with a table is exactly the same. Just pick any two points and plug them in.

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